To build a car you need billions of dollars worth of land, equipment, raw material, people, technology, and government compliance. Mean while quality transportation can be created by a passionate skilled builder in a two car garage with a few jigs, equipment, and some metal rods.
My intent is not to over simplify. It's just the beauty of the joke. It's happening next to a GAS station. Keep your friends close and your enemies closer? I chuckle every time I pass by. Simple hilarious.