Sure, the only purpose of a gun is to cause another person to die, but if you can make the person who's going to make you die, die first, or also, than you've prevented either your death, or any further deaths that individual will cause.
...But then you realise that it wasn't someone trying to break into your house and kill you, you just accidentally shot a family member. Whoops. Ah well, at least you've prevented future deaths that they may or may not have caused. Small victories, eh?
False sense of security my ass, right now I'm scared to leave my ****ing house... I was in front of a friends house when this happened, in plain daylight. It could happen to me... hell to anybody at any time, and it might not be a threat, the ****er could actually shoot the damn thing. If I have the ability to make the ***** either die before he can kill me, or pay for my life with his, then my sense of security is not false.
Okay, let's backtrack here:
You're walking along the street, suddenly you hear a car screech. You turn, and realise you're literally starting down the barrel of a gun. The gunman taunts you, but you just stand there. The car drives off and you live to write about it on HLP.
Now, let's see what would have happened if you'd had a gun, and would have thus been much safer:
You're walking along the street, suddenly you hear a car screech. You turn, and realise you're literally starting down the barrel of a gun. The gunman taunts you, so you move to pull out your own gun. The other guy sees you reaching for your weapon, and - since he already has his gun trained dead-to-rites on you - shoots you before you can even raise yours. You're dead, and the rest of HLP momentarily wonder why you haven't posted in a while.
Yep, too bad you didn't have a gun.

Great... we can have a dictatorial ****ing state... just the way I always wanted it to end up... **** you
You whine about having a gun pulled on you, but when somebody makes a sensible suggestion - more cops on the street - you whine about that and insult the person making the suggestion. What are you, twelve?