I disagree that there is no originality in art styles, human creativity amounts to more than just copying other people. There is no way a current gen AI model would be able to create truly original mathematics or physics, it is just able to reproduce facsimile and convincing bullshit that looks like it. Before long the models will probably able to do formal reasoning in a system like Lean 4, but that is a long way of from truly inventive mathematics or physics.
Art is more subtle, but what these models produce is mostly "kitsch". It is telling that their idea of "aesthetics" involves anime fan art and other commercial work. Anyways, I don't like the commercial aspects of copyright all that much, but what I like is humans over machines. I believe in freely reusing and building on the work of others, but not on machines doing the same. Our interests are simply not aligned at this point.