If we want to have more books, we need to protect the rights of the publishers—if publishers are not protected, then the market is just doing its job: publishing books is not going to be profitable if book contents are stolen without consequences. As a result, universities wouldn’t want to waste money publishing books, and for-profit journals would have to charge exorbitant subscription fees to compensate for the fact that no one except a few institutions will sub in the first place (everyone else will get the same stuff washed through an LLM).