Intent is a big deal in this one. Your Python book writer intended for people to read it to learn Python.
A romance book writer does not intend for an AI to use it to learn to generate sentences. But because there was no obvious barrier and they could get away with it, the companies grabbed the romance book and used it. That's an exploit.
And again, you're ignoring the quality of labor. Back-breaking jobs that hurt people's health should be improved with technology. A migrant worker might lost his job to a mechanical fruitpicker but he's likely bilingual and eligible for a translator job. Unless that job, which is better for health and longevity, and allows someone to stay in one place, is taken by an AI.
The promise of automation was that it would RAISE the quality of human life. Taking away the jobs of creatives lowers the quality of human life. Using automation to carve ice out of mountain lakes raises the quality of human life. Things are not neutral here.
The large companies want to keep manual labor in human hands and put creative work and decision making in AI hands. This is going to make life worse for everyone.