Like, Library of Alexandria or Council of Nicaea bad.
We may never be able to recover the information if, say, one of these AI companies copied or translated it wrong then destroyed the source material.
Maybe it's from bad OCR, or maybe from a bad actor - but there are a lot of ways history and information could change in this game-of-telephone like transfer of knowledge.
What is the point of destroying the source material? I don't buy the copyright thing.