OpenAI is saying that their service was used in violation of their TOS, which is a bit different than just copying data. To be clear I’m not on OpenAI’s side, but it looks to me that the legal situation isn’t exactly analogous.
Which is the most ridiculous argument they could use because they didn't respect any ToS (or copyright laws, for that matter) when scraping the whole web, books from Libgen and who knows what more.