The other factors being that enough people get killed so that a shrinking market share forces their management decide to change their car designs?

I have a libertarian streak when it comes to drugs, porn/prostitution, free speech, patent law, etc. but in this case I’m perfectly fine with governments “getting involved” to ensure that I can shop for a vehicle without becoming a random sample in a statistical study of car safety. Especially if a possible outcome is my preventable death.