You are applying an outdated mental framework to AI, not to mention a falacious view on the relation between copyright protection and the incentive for art. Have in mind that millions of humans have historically produced enormous amounts of art with no copyright protection of any kind. The protections you are trying to defend are a relatively recent phenomenon (~200 years); arguably, some of our best art was created well before these protections existed!
Additionally, the beauty of contemporary AI is that it's much more similar to the mechanism of inspiration and learning that humans employ than, let's say, the literal copy of a photo. I think it's reasonable for an artist to limit the visibility of their work and prohibit their images from being shared online and used by AI training - but this must apply across the board. If their image is public in a way that anyone could see it, and be inspired by it, then they need to accept that the AI could be equally "inspired" by it.
If you want an easy, concrete example of the process of inspiration and copying taking place for humans, just look at Animes. Styles are imitated by humans left and right, with no concern of original artists losing their livelihood. Human Anime artists copy their idols when learning to draw, oftentimes producing literal imitations for years before starting to produce their own original work, which to be honest usually greatly resembles the source of inspiration (PS: I like Animes, but most of it is very similar in terms of artistic style).
Do humans ever really "invent" any art? Or are the artistic innovators simply a mix of influence of existing art, the natural images of nature/life plus a spice of randomness? Because that's pretty much how AI art functions.