this is a common talking point for righties . If more guns are aviailble to people then there's less crime because everyone is armed .
Wouldn't that translate to a global scale with nuke weapons ? More countries wh nukes, then less likelyhood of war ! Right?
You can think of it that way if you like.
Crimes by a state such as N.Korea can only be deterred with nuclear weapons. However DJ Trump and his close generals are hoping they can extinguish N.Korea's nuclear capability before they develop it.
As far as your analogy to people goes, criminals are normally cowards who only prey on the weak. Therefore if you are strong, and armed, and a good shot, and you can draw quickly and shoot accurately, you will most likely scare away any criminal long before you have to shoot him.
But shooting him is not bad either -- it keeps recidivism low and prison populations lower too.
But not everyone has the balls to carry their own gun.
So if you
Timmy don't have those kind or any balls then you can go on pretending some kind of legislation will help you or that the police can protect you -- which they cannot.
Fallacy of false analogy.
List of fallacies - Wikipedia