It's not even about earning more money, though I won't deny it's a nice perk. I want to be as well-rounded as possible and having an option of earning a theoretical physics degree while working along (mostly) engineers presses all the right buttons in my head.
Sounds as though the past 3 years did a number on him as well.
It wasn't easy for anyone in the family, but I don't find his way of adjusting to it as appropriate. Switching from a laid-back academic to a raging control freak is hard to swallow. I still hope he'll turn around, just don't expect it to be easy.