In defense of being money centric, we are not talking about yachts and drugs level money. To me, money means buying a house, starting a family, taking care of my parents, looking after my own health, and overall stability. These are the hallmarks of what used to be a middle class lifestyle in America.
If people are getting PhDs to earn more money long term, these are also not people who intend to live lavishly. It only seems exceptional because almost every other avenue to previously “normal” life has been closed off.
There’s nothing wrong with studying something because you’re interested in it. But for me, it would’ve likely meant foregoing the above.