I don't know. I don't disagree with you, but I think it's sometimes more difficult than it seems initially.
This stuff has been very salient to me the last couple of years. I had a friend who was in a physically abusive relationship, and she was often comparing my behavior, feelings, and thoughts about my job to what she was going through. It's definitely not the same, I don't want to trivialize anything, but in some circumstances a workplace just becomes sort of [emotionally] abusive, extremely dysfunctional, and starts to have tangible harms for spouses, family, etc. in terms of lost time, income, career opportunities, etc. I wrestled a lot with questions like "is it better to not have a job than an abusive dysfunctional one, when it's hurting my family at some level too?"
This isn't the same as putting up with some awareness that what you're doing is existentially empty at some level (which has its own set of issues), but balancing costs and benefits of jobs sometimes is trickier than it seems initially. I think maybe it's the same as the grass-is-always greener you mention, although I think that can go pretty far.