Because what are you gonna do, drive from NYC to LA? What, and see what the people on the lower tip of Manhattan hath wrought the entire way there? C'mon.
I can get power and a stable internet connection on a train, so I can really work while traveling. Plus no worries about bags, tiny seats, pieces flying off the plane and people dribbling on you.
I use to fly regularity many years ago, now, never again. I told my manager over 10 years ago, I will never fly again, so allow me to drive or take a train on company time, or I will not go :)
No other way of travel is a bad as flying. 30 years ago it was rather good, now it is 1 or 2 steps away from torture.
