You're speaking from an Australian perspective about what is, to make an otherwise unsupported argument about what should be in the US. I'll be one of the first to point out problems and blindspots from the American conception of "freedom", but in this case it seems highly appropriate. You yourself even got bit by overregulation for something seemingly reasonable and forward-looking, and yet you're still reflexively defending it!
In my estimation your example "family of 5" is at much more risk from widespread unnecessarily-high bro-dozer trucks than a single engineer personally adding a jet engine to his car while seemingly being very in touch with the dangers of operating it. In fact given the severe disparity in other vehicle crash survivability statistics between coupes and trucks, I've got to wonder if this car isn't still individually safer than a casually-driven pickup truck.