What if that turns out to be completely irrelevant?
Let's say, for the sake of argument, that I knew absolutely nothing about contract law and was then filmed stealing a book you wrote on the subject from a book store. I then started a business where I would answer questions about contract law, based solely on what I learned from the book. Of course, my memory isn't perfect, but I don't like to admit when I'm wrong, so sometimes I just make stuff up. People line up to pay me anyway.
Now, the owner of the book store you might be able to get me arrested for petty theft. Do you think there is any possibility you, as the author, could successfully litigate a copyright claim against me? I'd argue not. Do you think you could get an injunction enjoining me from engaging in my contract law Q&A business? Again, I think that would be highly unlikely.
It isn't clear to me that any court is going to hold that LLMs are being used to create derivative works, any more than someone who reads a book, whether they paid for it or not, and then speaks or writes about a topic covered by a book they've read has done so. It is entirely possible the IP laws, as they currently exist simply do not cover what LLMs are doing. The laws certainly were not written with this kind of scenario in mind.