Agree with you but would add that even on the professional managerial side it is indeed a luxury - yes for many people it would be possible, but there's also many people (in startups, or small businesses, or not small but struggling businesses) whose options are as limited as teachers.

Some of whom might have good options for changing jobs, or good hopes of things improving in the near future, but for many it would be the lesser evil compared to trying to find a different job with the same positives (whether salary or other motivation) but without those negatives.