The only way to have agi or any ai is to throw away all ethics then. So why are ai companies shredding books instead of using Anna's archive? Depending on your stance, one is more ethical than the other, but not both. And not neither of them.
I'm sure they're using whatever they can get their hands on, including Anna's archive. The business process of buying books to scan offers the opportunity to ingest media that hasn't yet been digitized, but also provides plausible legal deniability against copyright holders bringing litigation.
Anna's archive is missing books and papers.
Abandoning ethics doesn't mean you actively seek out unethical acts, it just means you only care about pragmatics. Limiting how overtly you break the law, copyright law in this case, is often pragmatic regardless of ethics.
> why are ai companies shredding books instead of using Anna's archive?
I'm pretty sure they've already consumed everything on Anna's archive, Pirate Bay etc and they are now buying books to fill the gaps.