That's what makes this stuff so tough, tho. How many folks on that plane are in the midst of a personal emergency of their own? From my experience, it's rarely zero. Maybe someone on that flight is going to miss a connection to see their mother for the last time? Or the premature birth of a child? I've had both sit next to me on flights just this year. Not everyone lets the airline know what's going on.
As for why special accommodations couldn't be made for this guy, lets use what I like to call the "honeymoon principle." It used to be that when you went to Vegas on your honeymoon you simply had to tell everyone (from the desk clerk at the hotel to your waiter at dinner) that you were on your honeymoon. They went out of their way to make it special.
Then everyone found out about it. Two things happened: 1) a LOT more people went to Vegas on their honeymoon and 2) every couple told everyone that it was their honeymoon wether it was true or not.
So now, you might as well not even bother. Honeymoon's in Vegas aren't special, they won't even get you a room with a view.
It's the same thing here. In the course of a single day there are literally thousands of emergencies (both real and imagined) that people are tending to. How do you decide which ones get to skip the security line? How do you decide which ones get ride the golf cart to the gate? You can't, because as soon as you do everyone has a heartbreaking story to tell.
I wish it wasn't so, but lets face it, people suck.