because a plane falling out of the air has much larger potential for distruction than car running into another. Because its easier to regulate 30,000 planes ow

because a plane falling out of the air has much larger potential for distruction than car running into another. Because its easier to regulate 30,000 planes owned by a few dozen airlines made by a handful of manufacturers, than it is to regulate over a billion cars owned and maintainted by hundreds of millions of drivers and made by hudreds of manufacturers.