Again, that an opinion that will need to be tested in the courts.
You will have to explain why Hunter Thompson copying every word of every Hemingway novel isn't copyright infringement, but a computer doing the same is.
1. Humans are not machines; arguments saying because a human can learn LLMs must be allowed to copy is not interesting.
2. Did Thompson publish the work? It sounds like you're referring to an activity Thompson did in private, to improve his skills as an author. Meanwhile, lawsuits are alleging that LLM services reproduce copyrighted materials.
3. What can be fair use at small scale is no longer fair use at large scale.
You will have to explain why Hunter Thompson copying every word of every Hemingway novel isn't copyright infringement, but a computer doing the same is.