If ingesting books into an AI makes Anthropic criminals, then Google et al are also criminals alike for making search indexes of the Internet. Anything published online is equally copyrighted.
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I can read 100 books and write a book based on the inspiration I got from the 100 books without any issue. However, if I pirate the 100 books I've still committed copyright infringement despite my new book being fully legal/fair use.
Not only that but all of us are guilty too because I'm positive we've all clicked on search results that contained copyrighted content that was copied without permission. You may not have even known it was such.
Remember: Intent is irrelevant when it comes to copyright infringement! It's not that kind of law.
Intent can guide a judge when they determine damages but that's about it.