The US ruled similarly to Japan, but years ago, from copyrights through patents... from my limited POV, the LLMs (specifically) and art models are just regurgitating stolen concepts... echo'ing Picasso's great artists steal! mantra. The US has already ruled this is legal (e.g. newspaper content isn't "stolen" when a genAI summarizes it for a 3rd-party user).
Having sat with published authors, discussing their work/book with LLMs... it is really an interesting perspective on "readers' perspective(s)" [human ¬].