Because it hasn't happened. I've been screwed over multiple times by a company that's supposed to be good. There aren't really any good jobs in my area and my wife won't move. I don't have any desire to improve at work because it won't be rewarded. It's really pavlovian - repeatedly beat a dog and they are just going to hide in the corner in hope they don't get beaten again.

Immobility may not be an obstacle for you anymore. The most competitive eng. positions are fully remote now by necessity, because the best people have come to demand it over the past year.