That's why it's a chicken and egg problem. No one wants to be in a less safe car when there are so many accidents (and deaths from them) every year.
I think people talk a lot about safety, but I don't think that is as primary of a concern as everybody says that it is for them. How many people actually go research and learn about all the cars they are shopping, vs people who just go to a dealership and listen to a salesman and buy what's in their price range?
Most people don't even read the damn owners manual, they don't even know what that big yellow light is (TPMS or CEL) that has been on for months. They won't buy winter tires in the winter, even though you can get a set for like $700. $700 is too much to spend to increase winter safety by a large margin on a $30,000+ car. Hell, people don't even use turn signals. The little stick that is less than 2 inches away from where your hand should be, and you don't even have to take your hands off the wheel to activate it. The problem is you'd have to decide which of your 16 cupholders to put the cup in, then reach way over and put it down before you could signal.
Regardless, safety is still wanted. Just because people don't go over the top doesn't mean they don't want any at all. Having a lighter vs heavier frame would make a significant difference in a collision between regular-style cars and new, lighter ones.
The rest of your comment is attacking a strawman.
At some point in the future, I hope the NHTSA takes in "probability of crash" into their safety ratings for self-driving vehicles. Otherwise the safety bloat in modern cars will stick around. The equivalent of wearing a motorcycle full-face helmet while riding a bicycle.