However, like you're getting at, there are people who would say personal rights always outweigh society's rights. I think we can get rid of copyright law and still remain a free market capitalist economy, with limited government and maximal personal freedoms.
However even if you were correct, would you be willing to trade copyright law for having a cure for most diseases? I would. Maybe by allowing 1000s of people to sell books, you've condemned millions of people to death by disease right? Can you not see that side of the argument? Sometimes things are nuanced with shades of gray rather than black and white.
All I know is society decided that copyright was worth the tradeoff of having people release their works and now huge corporations want to change the rules so that they can use those works to creative a derivative that the corporation can profit from.
If LLMs were just doing data compression and then spitting out what they memorized then that would violate copyright, but that's now how it works.