Yeah, it's disheartening. There's also no good way to fix it; the cost of storing copies of their art is negligible, and AI trains the same whether the material is copyright or creative commons. If you get Stability AI to omit your art, then Unstable Diffusion will be trained on your likeness. Opt-out of that one, and some guy in Nevada personally sponsors a bespoke model for making copies of your art.
So, I agree with the parent. The most tragic part is not the short-term fight, it's the long-term consequences. Artists will have to internalize what software developers realized decades ago; creating takes work, and copying is free.