I don’t know whether it is true that such bosses expertly manipulate passionate workers into slavery. Based on experience, I have an alternative theory: those kinds of bosses have an “ambitious” personality (for the lack of a better word). They are never happy no matter how much they achieve, and so they demand more and more from others. It may very well be that in the end they end up with a lot of wealth, but in their minds they failed because they’re comparing themselves with even more successful people. So it’s more a case of “crying all the way to the bank even thiugh the account is filled”.
Sometimes that means not going out of your way to explain how you implemented a feature. If your company is going to treat you like an expendable money sink treat them like a hostile actor too.
Its not that liking your job is bad, its treating employment in the traditional sense - salaried or hourly - as if being charitable with your time or ability to your employer because you like doing it so much is a virtue. It isn't, its just giving those with power more power out of laziness. Because its lazy to just give yourself away like that. It takes courage and strength and effort to fight for fair compensation and a balanced lifestyle that doesn't revolve around making someone else filthy rich.