If you have a handgun or rifle or whatever and even if you did not buy it for killing someone, you can never know what you gonna do in a case that you are get in to histerics or when you have a nervous breakdown. Having gun may push you to shoot someone when there is legal solitions instead.
The same argument works even better for not owning a car.
I've had 'road rage' a couple of times and have done risky moves to keep someone from doing a dick-head illegal pass on me or to demonstrate my dis-satisfaction at being held up for miles by three slow drivers driving side-by-side on the freeway. I've never even come close to such a thing with my guns. In fact I've specifically and deliberately left my guns locked up when I go out to confront someone on the county road which runs through my property.
At the end of the day, automobiles pack vastly more energy and it is vastly easier to deploy that energy against another human being by accident or on purpose than is the case with a firearm.
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(Actually the people who want to get rid of guns also want to get rid of cars and have only self-driving taxi cabs. Maybe not now because the programming for the end-human-driven-cars project has not been widely uploaded into people's brains yet, but we know who will be susceptible to it when this particular over-the-air update is rolled out; the same people who are now on the anti-gun kick. The same people who want to get rid of guns also want to get rid of cars. It's all part of a certain technocratic vision. And they own the upgrade mechanisms.)
