Most of the tech companies I have worked at are ridiculously easy and generous, I get to work with smart people, and the entire job can be done in a few hours per week. It's not like we're doing manual labor and digging ditches; half the people on this website are laptop-class workers who occasionally use the slightest bit of energy to write a few lines of code or participate in a meeting.
I show up to work and I often do extra because I like it.
The company isn't "extracting" anything from me except the extremely consentual labor I want to give back simply out of the love of the game. If you don't feel that way, the problem isn't the capitalist system it's probably your own life choices.