plane and bus

A student of mine works at home with a computer. So he can work anywhere in the world. At present, he is based on New Zealand, India and Japan. He travels really often, which is surprising to me. When I heard about his traveling life for the first time, I said, "Amazing! Incredible!" He just answered coolly to my surprise, "Today there's no difference between getting on a plane or a bus. The only difference is that ariplanes make you more tired," Wow! When you travel a lot, you come to think like that!