I'm not sure I understand this argument. If I go to the library every day for 10 years and learn everything there is to know about subject x I shouldn't be able to sell my skills to the world about it later because I didn't give the creators of the books I read any money?

Arguably LLM companies could have made large-scale deals with libraries and got the exact same knowledge (much, much more slowly). I wonder if people would have the same issues then? My guess is probably. Goes back to the meme that if libraries were proposed today there's no way they would ever be allowed.