Opportunity cost
The opportunity cost is the opportunity lost. Not only do pilots have to front the cash for four years of college and flight training but they also have to consider the wasted years after getting licensed and education trying to build experience.
It all goes onto the great hole in the sky and needs to be counted. Your first clue that something is wrong is when your friends and peers outside of aviation start buying houses, getting married, and building lives while you are still living like an impoverished college kid.
Buy the house instead.
Skyhigh