No royalty contract is getting an author a thousand bucks per sale. If you have to wildly exaggerate to make your point, then the point isn’t compelling.
Books have a resale market. Every “lost sale” isn’t necessarily of a new purchase from a bookstore or
Amazon.
Copyright has a place. Rent-seeking authors attacking LLM owners is not a sympathetic case. Said authors are demanding to have their ideas relegated to unknown backwaters. It makes the authors worse off. It makes the community poorer. Cui bono?