Generative AI training is not the same thing as human inspiration. And transformative work has this far has only been performed by a human. Not by a machine used by a human.
Clearly using a machine that simply duplicates a work to resell runs afoul of copyright.
What about using a machine that slightly rewords that work? Is that still allowed? Or a machine that does a fairly significant rewording? What if it sort of does a mashup of two works? Or a mashup of a dozen? Or of a thousand?
Under what conditions does it become ok to feed a machine with someone's art (without their permission) and sell the resulting output?