Because the rest don't have the guts and fly. Cowardly pansies!
I think I know why know. Just today on the way home from the Grocery Store I saw the ugliest Camper in the world. It looks like someone took a small RV, and tried to make it look like a Mini-Van. It looks butt ugly as hell. It's called a RoadTrek, Pacific Edition. On it's plate said, "Beatiful British Columbia." Ugh. Talk about a lack of national pride....