Care to point out WHERE I ever said a pocket gun is of no value? You can't do so, so you are lying about that. After you admit that, and apologize for putting words in my mouth, I MIGHT consider you worthy of being answered.
A .22lr pocket auto can handle 90+% of civilian confrontations, because well over 80% of attackers will back down at just the SIGHT of your (ready) gun, or at shots fired that dont hit them. About half of those who don't back down, will stop at being solidly hit in the chest, with 1-2 .22's, and if you are REALLY skilled with the .22, you can also sometimes make head shots. Even if the bullet does not reach the brain, an 80 ft lb lick to the skull will rock his world, letting you shoot at him again, and delaying his closing with you, or his ability to shoot you. In that delay-time, you can hit his head again,most likely, and repeat until a .22 slips into an eye socket, sinus cavity, temple, or base of skull, or until you can break his leg with a sidekick and then kick his head off of his shoulders.