If it is commotio cardis or whatever then it's a one in a million sort of thing. I doubt too many are going to hang it up because of that. I mean, just about everyone knows someone who died in a car accident. It doesn't stop most of us from driving on a daily basis.
No but it might make you do something different in how you drive because of what happened to that person.
Perhaps they take a look at the chest padding or something.