In my first job we had a PM who was completely fried. Always on edge, super stressed, not quite right. It was explained to me that up until not long before that

In my first job we had a PM who was completely fried. Always on edge, super stressed, not quite right. It was explained to me that up until not long before that she had been an air traffic controller and this is what the job did to people. I have no idea to this day if that was a n=1 anecdata or if that's true, but it left a lasting impression in my head.