I can understand them. My favourite artists have declared that they aren't going to complain or fight against it, I wrote about this with one of them privately and he wrote that it's a part of natural progress and he finds it fun. I personally still much prefer human art. What I certainly dislike are people who upload too much of it. A human artist uploads 2 per month. An AI artist uploads 2 per day - that's the difference. Search, filtering and recommendation basically use algorithms from the 1990s, while AI art is miles ahead. Weird order of things. But I don't think it's stolen art, AI learns like a human learns, on someone else's art. No human ever could paint very well without seeing other people's paintings and learning on them.