That's always been the question. It's never been different. It's all the things one might think of: family tradition, perceived honor, self-testing, the MONEY. And before people chime in that no amount of money is worth what you do, yeah, no shit but it beats working in a coalmine for 4 bucks an hour inhaling coal dust don't it; if it didn't, there'd be a lot more people who stayed in the literal mines.