The ridicuolus things about this are
1) That amount of interior space needs such a huge exterior only because manufacturers can get away with hugely inefficient packaging -- "Hey, if you want more space than a 1984 Honda Civic, just buy our Humongo-Ultra-Barge in stead of the mere Humongo-Barge!"
2) That safety comes only for the actual occupants of the Humongo-(Ultra-)Barge, at the expense of everyone else -- like, the pedestrians you run over with your Humongo-(Ultra-)Barge because you can't see them from inside your Humongo-(Ultra-)Barge -- and is only necessary because everyone else (except those pedestrians) is also driving around in an Humongo-(Ultra-)Barge.
:: Impose those significant costs larger cars and you'll actually be safer in a smaller car, because then everyone else will also be driving around in smaller cars in stead of Humongo-(Ultra-)Barges.