As far as CGI versus traditional is concerned, well, in this case, it sounds more like you do you because you know you, and random Internet commenters' theories are just that, and obviously should be taken with a grain of salt or two.
As for your "if furries don't like, why would not non-furries like it?" Have you ever considered that furries might be bored with furry? It's not "novel" for furries to see cartoon animals; we have e621 with it's millions and millions of tags which allow us to find the very, very, very, very, very, very specific version furry we want. But, actually, go to e621 and look at it; and, to preface, I'm not even talking about weird ass fetishes, here (though, yes, once again, furries are so bored with furry sex that they can't even get it up unless someone's eating someone or being blown up like a balloon or made of slime or something anymore).
Furries like foxes, right? Except, actually, type in fox and find just an anthro-red fox with naturalistic fur coloring and is non-hybridized with some other animal or isn't a vampire or angel or demon or I don't know what, and, okay, you can probably still do it (even if you also eliminated furry fan-art of mainstream characters) but it's harder than you'd realize. Furries are people, and they like novelty just like anyone else, and right now you've got hot pink/sky blue/neon green polka dots with fuchsia stripes on a neon purple base red fox/wolf/sabre-tooth tiger/iguana/koala/tiger shark/king cobra/husky dog/dragon hybrid with angel wings, demon horns, seventeen tails, tribal tattoos, a facial scar, five dicks, two vaginas, and, what the hell, let's throw a cloaca in there as well, who's counting, and also wears glasses, and that's the baseline necessary to even sort of get some sense of novelty.
The really interesting thing is, you look at something like Sabrina Online from 19-freaking-96, and maybe it looks well-worn if you're a furry, but it's a cartoon animal world with adult themes with a female protagonist struggling with real world problems like paying the fucking rent while working at a job she doesn't actually like with a boss who makes the already shitty job that much more of a nightmare and that's twenty years before Zootopia had the exact same starting point and 22 years before Japan (fucking Japan, guys) got adventurous enough to do the exact same plot with Aggretsuko, except somehow less risque. The mainstream has taken two decades to get to our so old, it's literally fucking retired.
There was that guy, a couple years back, he claimed DreamWorks had stolen the idea for Kung Fu Panda from him, and he produced this artwork that ended up being traced from a Lion King coloring book as "evidence", and everybody laughed and he ended up getting the shit fined out of him. And I submitted a news piece about it to a non-furry, but obviously aware of furry (and that I was furry), site, and I was taken aback when some guy actually asked me, oh, yeah, this guy must be well known in furry, what's his story, cross? And I was all like, are you kidding me? Furries don't give a shit about mainstream animation studios; if some furry got caught in a scam involving tracing coloring books, it would be to scam other furries out of fifty dollar "fursona commissions" on Twitter or some shit. Not a multi-million dollar copyright scam with a major corporation. It never even occurred to me that the story about cartoon fucking animals might have a cartoon fucking animal fandom connection.
Because furries just kind of gave up on the mainstream a while back; I mean, to be fair, you read about stuff like Gamergate and the Pepe-er side of the alt-right, and every fucking thing they're doing are techniques they learned and perfected in the two decades before against furries. And people are realizing this, and are both starting to get both genuinely interested in what we create, and also, hey, realizing we kind of took a lot of shit for things we either didn't do, period, things we did that everyone else did too or even things we did that we were right for doing the entire time, and maybe there's a little guilt there they want to make up for.
I've been told time and again that the future is furry, and it's not furries telling me this. Because the other consequence of being getting old beside just getting bored is that you get complacent. I guess that's the rambling point I'm trying to get with the last couple paragraphs; don't let the freaking weird shit going down on e621 fool you (that's just boredom), but a lot of furries are comfortable, risk averse and not looking to rock the boat. And making a movie for the mainstream with a furry sensibility is a risk. Not just for the maker of the movie, or the possible mainstream backers; but for the fandom. Because it will change the fandom, and some people don't want the fandom to change.
tl;dr - Furries are bored and complacent, so they might not actually be that interested in a furry-by-furries movie.
As far as CGI versus traditional is concerned, well, in this case, it sounds more like you do you because you know you, and random Internet commenters' theories are just that, and obviously should be taken with a grain of salt or two.
As for your "if furries don't like, why would not non-furries like it?" Have you ever considered that furries might be bored with furry? It's not "novel" for furries to see cartoon animals; we have e621 with it's millions and millions of tags which allow us to find the very, very, very, very, very, very specific version furry we want. But, actually, go to e621 and look at it; and, to preface, I'm not even talking about weird ass fetishes, here (though, yes, once again, furries are so bored with furry sex that they can't even get it up unless someone's eating someone or being blown up like a balloon or made of slime or something anymore).
Furries like foxes, right? Except, actually, type in fox and find just an anthro-red fox with naturalistic fur coloring and is non-hybridized with some other animal or isn't a vampire or angel or demon or I don't know what, and, okay, you can probably still do it (even if you also eliminated furry fan-art of mainstream characters) but it's harder than you'd realize. Furries are people, and they like novelty just like anyone else, and right now you've got hot pink/sky blue/neon green polka dots with fuchsia stripes on a neon purple base red fox/wolf/sabre-tooth tiger/iguana/koala/tiger shark/king cobra/husky dog/dragon hybrid with angel wings, demon horns, seventeen tails, tribal tattoos, a facial scar, five dicks, two vaginas, and, what the hell, let's throw a cloaca in there as well, who's counting, and also wears glasses, and that's the baseline necessary to even sort of get some sense of novelty.
The really interesting thing is, you look at something like Sabrina Online from 19-freaking-96, and maybe it looks well-worn if you're a furry, but it's a cartoon animal world with adult themes with a female protagonist struggling with real world problems like paying the fucking rent while working at a job she doesn't actually like with a boss who makes the already shitty job that much more of a nightmare and that's twenty years before Zootopia had the exact same starting point and 22 years before Japan (fucking Japan, guys) got adventurous enough to do the exact same plot with Aggretsuko, except somehow less risque. The mainstream has taken two decades to get to our so old, it's literally fucking retired.
There was that guy, a couple years back, he claimed DreamWorks had stolen the idea for Kung Fu Panda from him, and he produced this artwork that ended up being traced from a Lion King coloring book as "evidence", and everybody laughed and he ended up getting the shit fined out of him. And I submitted a news piece about it to a non-furry, but obviously aware of furry (and that I was furry), site, and I was taken aback when some guy actually asked me, oh, yeah, this guy must be well known in furry, what's his story, cross? And I was all like, are you kidding me? Furries don't give a shit about mainstream animation studios; if some furry got caught in a scam involving tracing coloring books, it would be to scam other furries out of fifty dollar "fursona commissions" on Twitter or some shit. Not a multi-million dollar copyright scam with a major corporation. It never even occurred to me that the story about cartoon fucking animals might have a cartoon fucking animal fandom connection.
Because furries just kind of gave up on the mainstream a while back; I mean, to be fair, you read about stuff like Gamergate and the Pepe-er side of the alt-right, and every fucking thing they're doing are techniques they learned and perfected in the two decades before against furries. And people are realizing this, and are both starting to get both genuinely interested in what we create, and also, hey, realizing we kind of took a lot of shit for things we either didn't do, period, things we did that everyone else did too or even things we did that we were right for doing the entire time, and maybe there's a little guilt there they want to make up for.
I've been told time and again that the future is furry, and it's not furries telling me this. Because the other consequence of being getting old beside just getting bored is that you get complacent. I guess that's the rambling point I'm trying to get with the last couple paragraphs; don't let the freaking weird shit going down on e621 fool you (that's just boredom), but a lot of furries are comfortable, risk averse and not looking to rock the boat. And making a movie for the mainstream with a furry sensibility is a risk. Not just for the maker of the movie, or the possible mainstream backers; but for the fandom. Because it will change the fandom, and some people don't want the fandom to change.
tl;dr - Furries are bored and complacent, so they might not actually be that interested in a furry-by-furries movie.