It's all very well saying that if you have a gun you can confront an intruder, but what if the intruder has a gun as well? Do you think he'd be more likely to shoot first at a person pointing a gun at him, or the person who has no gun and is therefore no threat to him?
If the criminal is carrying a gun they're likely to subscribe to the theory of "never point a gun at someone unless you're willing to pull the trigger". In that case, threatening him with a gun of your own just makes it more likely that he will shoot you
If the criminal is carrying a gun they're likely to subscribe to the theory of "never point a gun at someone unless you're willing to pull the trigger". In that case, threatening him with a gun of your own just makes it more likely that he will shoot you