Simple answer,
No other career pays so much to be a work-shy slacker, and it requires little or no talent or intelligence. Disagree? Count how many malcontented sour pusses there are on the forum; "My employer expects me to actually come to work and fly. Moan moan moan. How bloody rude. I had plans for today. Moan moan moan."
Very short (but expensive) training period unlike the other professions pilots like to compare themselves to. The only real barrier to being a pilot is financial.