no, car collision deaths aren't a necessary evil, which is why heavy regulation on car safety has reduced the number of deaths. you need to register a car, you need a licence to operate it, it needs to be built according to safety regulations, and there's lots of laws limiting your use of cars.
there are literally zero parallels with guns, whose sole purpose is to injure and kill.
as for dealing with illegal guns, oddly the issue doesn't exist in countries where you can't buy a shotgun in the same store you buy your beer. so i don't know, maybe look abroad.