Why? Cars kills way more people than guns. Often not because of a need to get from a to b but because of reckless driving just for the fun of it. So - you could argue - you should not only need to have a drivers permit but a driving permit for your actual trips.
Ok. Maybe cars should be banned. Or at least restricted to people with a legitimate reason like politicians and doctors.
But do you think it will end there? If we give up cars then air traffic would be a natural next step...
You see?
This is why I defend the right to have guns, the right to modify cars, have real crypto, say almost[0] anything you want. Because it is a cheap insurance against a society that we really really want to avoid. Because the majority of people who have been killed have been killed by their own or a neigbouring country - not by their neigbours who happened to have a personal gun.
[0]: including: "I belive the person behind reitanqilds account is stupid"
Not including: "Hi guys! Lets start a fundraiser to kill <anyone>"