How tall are you? I will literally skip a family vacation if I can't get a better seat on an airplane, to the point it's caused strain in my personal life.
I agree with your overall assessment that people will (usually) buy the cheapest thing, but I find it utterly bizarre a truly tall person wouldn't even care about being physically uncomfortable for hours on end. I'm curious if we just disagree on what "very tall" means, like 6' is not that tall.
When I didn't have status I just paid for it, but every seat having extra legroom isn't in and of itself enough to move the needle for me.