I'm trying to be careful how I type this, but the point of crumple zones isn't just to make the car stop slower, but to keep parts of the car you really don't w

I'm trying to be careful how I type this, but the point of crumple zones isn't just to make the car stop slower, but to keep parts of the car you really don't want to crush from crushing. If you crash into a wall at 20km/hr, it's a lot better if the engine bay gets smashed up, than if the compartment you're in collapses around you.