You're implying that cars are fully or partly responsible when in a crash or when someone was killed on purpose with a car which is ridiculous since they are just inanimate objects like guns. I don't think hardly anyone says that people are killed by someone using a car usually people say that they died by a drunk driver or that they were run over. not that they died because of a car. And when people die in a car crash people don't say that we should make it harder to get access to cars we press no driving when drunk.
people die BY guns, not guns killing people, guns can't just go on a mass shooting that is implying that they can shoot without an operator.