Here's something to try on for size. It is a known fact that wearing flame retardant suits (like fire fighters wear) would save a lot of lives in auto accidents. They're big, bulky, hot and not at all comfortable to wear.
By your logic, we should pass a law requiring all occupants of a motor vehicle to wear them while riding in the vehicle because wearing them would save lives.
Such an intrusive law passes your tests, but not mine. That is where we differ. We separated from England over such as this but that spirit seems to be fading.
AHHH but fire in a vehicle was adressed another way. At the manufacturers level. Remember the mercury Bobcat ( bombcat) or the 73 to 87 chevy truck fuel tanks?
See why I said in the very begining of this thread that the best way forward was to simply have seat belts required for safe operation of a vehicle?
Thanks for pointing that out, it gave me an opportunity to show a spot that I was ahead of the game! :)