It doesn't matter how rare the scenario is in reality, fear often isn't rational, but it makes us do things and we have no control over it. My point isn't that the fear is rational, it isn't. But unless you have a method to prevent people from assuaging their irrational fear by buying a certain vehicle, (or voting a certain way, for that matter), what is your proposal?
The method is obvious - adjusting the law so that such vehicles become way more expensive than the more reasonable ones. Don't ask me how to get that pushed through though.