There are plenty of family and/or medical related reasons to spend a large amount of time doing work for somebody else.

Because you don't doesn't mean it's wrong, stupid, or pointless.

I have a hard time imagining a world where nobody worked for anyone else. Who would drive the garbage truck?

A robot.

Even when you have your own business you are always working for someone else, customers or shareholders are your bosses. Dont fool yourself.

Yeah, I realized I didn't write what I really wanted to say, which was, why would you stay at a job you hate? Or even a job that you barely tolerate? Or a job that you are apathetic about? One life, and most of your time is going to be spent at that job. It should be something you like at the very least.