There are plenty of people who think that, and FOR THEM, that makes sense. I can go on and on about how on a bike, the scenery changes at the right rate, or how good it feels to push really hard sometimes and get to the top of a hill, and then how fun it is to go into full tuck and see what max speed you can reach before the bottom, or how the scent of the air changes as you go from dry chapparal to moist redwood forest and back, but that's what's important to ME, not them. They could probably go on and on about whatever it is that floats THEIR boat - maybe even actually boating.