I've seen people with un-stressed about money with net-worths that are orders of magnitudes below those that seem to obsess about it.

Your motivations are your motivations, if you don't like the idea of someone using your work to make money without giving you a cut, you can do you, but why is it hard to understand that other people might just not care that much about it (or, gasp, even find their work being used more rewarding than the potential monetary compensation)

It does affect humans doing stuff that isn't malicious, like if you need to solve a problem by modifying the code then now you also have to make that change public which is a hassle, I'd rather not have to track or maintain such things. I'd rather not have to think about that, and I care more about such nuisances than I care about the possibility of companies stealing it.