They have the right to ingest data, not because they're “just learning like a human would". But because I - a human - have a right to grab all data that's available on the public internet, and process it however I want, including by training statistical models. The only thing I don't have a right to do is distribute it (or works that resemble it too closely).
In you actually show me people who are extracting books from LLMs and reading them that way, then I'd agree that would be piracy - but that'd be such a terrible experience if it ever works - that I can't see it actually happening.