> force AI companies to shred books they want to ingest.

Nothing forces them to shred books, they do it because it's slightly cheaper that way.

There was a court case where they said that if they copied the books it's not fair use because they didn't own it but if they bought physical copies and then destroyed them then somehow it was fair use because it fell into the niche of personal backups. I forget the details but basically they buy one time prints and destroy them immediately.

I had no idea about that, or how fucking bad this actually is:

https://en.wikipedia.org/wiki/Project_Panama

So I stand corrected: at least some don't do it because it's cheaper (than to buy a license, or simply forego some things), but because they're fucking evil, or so stupid that it effectively is the same as being extremely evil.

They do it because, for each work, they bought one copy, which they scan and no longer need the physical version of, and would be in copyright violation if they keep more copies than they bought.

>and would be in copyright violation if they keep more copies than they bought.

They can contact the copyright holder and ask/buy a license to make multiple copies.

yes and they can ask for a pony and then a unicorn too

For what?

By destroying them they don't copy only convert them into another format.