If I read Harry Potter, then turn around a write a book about a wizard with a z-shaped scar? Who works at a school for wizards? With a pet owl? Who is an orphan? At some point I have started to violate intellectual property rules. (Ignoring all the Harry Potter material that was itself lifted from prior public domain art.)
AI systems aren't just reading, they are generating material based on the stuff they have read. They and the people controlling them have to abide the copyright rules just like any other "author".