Stress
We don't know about you, but when we watch baseball, we're either in the stands chowing down on hot dogs and wearing team colors, or on the sofa chowing down on popcorn and wearing our stretchy elastic-waist pants. The biggest stress comes from whether to hit the bathroom in the eighth or to just hold it.
Watching baseball when you're an umpire, however, is a little less chill. During the game itself, you need to be continually observing and analyzing the tiniest movements of the ball and the players for at least three hours—and there's always the back-breaking possibility of extra innings.
Spectators may fall asleep halfway through the game, but umpires rarely close their eyes—they even regulate their blinking by pitch. "Keep your eye on the ball" isn't just a helpful suggestion, it's a way of life.
Life as an umpire off the field isn't a vacation in the Bahamas, either. Umpires work long hours away from home, sometimes working multiple games per week (or even per day) in multiple cities. Can you squeeze in an awesome trip to the Bahamas? Sure—they need umpires there too.