Yea someone can always argue......well what if you get attacked by a gang of 12 people who are all 6'6 300 lbs, who are wearing bullet proof vests, and are high on meth and they keep attacking even though you're shooting them........... well, maybe in that case a small revolver wouldn't be enough..... but outside of those types of situations.....
I am always amazed by the folks who carry two pistols (typically a 15+ round capacity and a "backup gun" in an ankle holster), 4 extra magazines, two pocket knives, a bowie knife, a super bright flashlight, brass knuckles, and pepper spray on their body everywhere they go.