People have always been, and will always be, selfish narcissistic cunts. That's why the concept of regulation exists.

That's where the market led us. We have to accept some responsibility but I can't just build my own car when I don't find one I like.

A huge chunk of it is because the USA has a huge tax incentive for car manufacturers to make bigger cars. When fuel efficiency standards started coming in, trucks were exempted because farmers needed their trucks for farm work, it's a loophole that encourages the manufacturers to build bigger vehicles to avoid these taxes. These massive vehicles are unusually cheap in the USA. If these loopholes regarding fuel efficiency were closed out people would be financially incentivised to buy smaller cars. Unfortunately, money talks. People aren't all selfish, they're just doing what makes sense for them.

Everyone, including you, is such a cunt. It just depends what issues really matter to us.