I don't know why. But my mom's coworker dying in his mid 50s just was one of the last straws before I quit my office job. It made something click.
You can work your whole life and “delay gratification” and wait for the golden retirement/vacation… only for you to die before it.
This happened over 4 years ago but I still think of it often. That someone can die in the middle of a workweek and all they had was the weekend.
There is no such thing as stability either.