Neither are terrible arguments. They are not exactly equivalent, obviously. A car does have crumple zones, meant to slow deceleration of the vehicle itself.

Neither are terrible arguments. They are not exactly equivalent, obviously. A car does have crumple zones, meant to slow deceleration of the vehicle itself. It is assumed that passengers and objects are somehow attached to the car, such as by a belt device of some sort I imagine. The crumpling effect doesn't help you when you propel into the person in front of you, or as in many cases, through the windshield itself and into something that's not so crumply. You absolutely would not drive into a wall sans seatbelt at 30mph, even with a newer car. You'd be a fool to do so, as you will get injured and MAY not survive said injuries.