You never hear music in a show or movie that sounds like a shitty knock-off of popular music to comply with copyrights? It happens a lot.

"Princess Mononoke 2" would copy a bit more than merely style: characters, setting, theme, story, expression.

Imitating mere style (like Ghibli) for something substantially different was legal before just as it is now for human or LLM. I think people like you are throwing fits because they never realized it (or cared) until LLMs started doing what skilled people were already doing long before.