Sayi "they have the money" is not an argument. It's about the amount of effort that is needed to individually buy, scan, process millions of pages. If that's done for you, why re-do it all?
I'm against Anthropic stealing teacher's work and discouraging them from ever writing again. Some teachers are already saying this (though probably not in California).
Writers that have an authentic human voice and help people think about things in a new way will be fine for a while yet.