this is where its ambiguous IMO,
we all carry traces of what we've all seen in our heads.
e.g. I can draw x-wing fighters, darth vader etc from memory.
but I can't sell those.
same with AI art. you can't sell images of IP
some rulings have been made like this
I think there's a compromise to be found that lets us all benefit from this new capability (ability to copy *generative rules* vs finished works)