DaasYochid, it’s got nothing to do with the fact that more people drive than fly. There are more injuries and fatalities when driving than when flying, per passenger/mile traveled. Simply put, if you have to travel 500 miles, you’re more likely to be hurt if you drive than if you fly.
Phobias can’t always be explained; they just have to be lived with. Some people are afraid of being enclosed in small spaces, while others are afraid of being unprotected in wide-open spaces. Some people are afraid of crowds, others of isolation. Some of heights and some of being at the bottom of tall buildings. You can’t reconcile those, they’re opposite phobias, but both are very real and debilitating for their sufferers.