That's a pretty reductionist view. Even maximally pro-IP laws usually have significant carve-outs for derivative works or other scenarios; see for example the US's extensive "fair use" doctrine.

You're begging the question: it's not established the LLM models are derivative or fair use under those laws.

Also, the de facto state of fair use in the US is not what I would call "extensive".

Do I have to repeat "copyright violation isn't theft" on every post for eternity?

If I make copies of Project Hail Mary and sell them at half price, do you think it's obvious that should be legal? I think Andy Weir would have a decent moral as well as legal case for theft.

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Many things aren't theft, but are still neither moral nor legal.