I recently went down this rabbit hole and I wonder... why most of these people are trannies or furries? Lmao I could totally make a bingo out of this.
Furry artists are heavily anti-AI simply because they have a financial incentive. Furry art is fairly "unique" in that it is heavily pornographic, which that alone means most "normal" artists won't touch it, and then add "animal" characters on to it and even less artists will go anywhere near it. There's a high demand, but low supply, which means it is
very profitable. Nowadays it is not uncommon to see even barely average furry artists charging $150-200+ for commissions, with those popular enough to just do "Your Character Here" auctions going for literally $1000+ in some cases.
Most other communities don't have this issue. You have a human "OC"? Find a picture of a person close enough, and drawing humans is probably the most common art subject in the world. Fantasy elf? Cool, there's thousands of generic elf pictures out there because of D&D and LotR and GoT and Pathfinder, etc, etc. Anime? They all draw the same style anyway so generated art isn't nearly as big of a threat since looking the same is expected, and again, heavy bias towards humans. Lots of alternatives keeps prices low. For the most part, they get commissions because people
want to commission them, and so AI is a minimal threat.
Furries, though? You aren't going to find many images of a blue-furred German Shepard with two cocks and a musclegut. Good luck finding a stand-in for your purple bunny girl with six pairs of tits rocking both a dick and a pussy. Nope, you're probably going to have to commission it. That is why AI is a
massive threat to furry artists -- there has never been a real alternative to commissioning them at whatever price they ask for, and now there is, so they
need it to fail (or be socially shunned). The moment AI gets a foothold and is able to openly produce that kind of content, they will have to lower prices and take more work (or get a real job).
(Slight tangeant here: This is also why you don't see many fursuit makers rallying against AI, despite being furries. AI
can't replace them, and more people having references of their characters (whether AI or not) means more business for them. AI is great for physical artist income, horrible for digital. They will never admit this, though.)
As for the tranny part: because furries. Furries are, in my experience, the biggest group of "I'm a woman now and if you even THINK otherwise you're BANNED", along with programmers (most of which are also furries anyway). Like a third of the threads in Animal Control are transwomen.