Let me give you a hypothetical that’s close to reality. Say an artist gets very popular, but doesn’t want their art used to teach AI. Let’s even say there’s even legislation that prevents all this artist’s work from being used in AI.
Now what if someone else hires a bunch of cheap human artists to produce works in a style similar to the original artist, and then uses those works to feed the AI model? Would that still be stolen art? And if so, why? And if not, what is this extra degree of separation changing? The original artist is still not getting paid and the AI is still producing works based on their style.