It is not natural in the industry to preserve books! It's tricky to even give most books away. Our library has big donation boxes, and my understanding is: most of those books are destroyed.
The copyright thing I get, sort of (I mean, it's galling, because it's such a total special pleading argument from a cohort of people who otherwise have absolute contempt for copyright on anything other than code). The model trainers are getting away with something other people haven't gotten away with. OK, sure.
But this seems like the AI water use story, where the reality is that existing industries do whatever the bad thing is at scales cosmically larger than AI ever could, and we're zeroing in on this weird little slice of it that AI does. Like, let me know when we stop growing pecans in the California desert, and then we can talk?