Quote from IShopAtPublix:
It should be obvious. We are supposed to make guns available to people because, god forbid, a 110 lbs woman could get assaulted by a 220 lbs thug. Problem with this scenario is that by making guns amply available we increase the likelyhood of this woman's assailant BEING ARMED WITH A GUN HIMSELF thus making the original intent moot and stupid. Similar reasoning could be applied to burglaries.
In the former case the thug has almost no chance of losing. In the latter case it's at least 25% and maybe even the odds are against him. More importantly, he knows that if he loses, he is going to die or get horribly injured then jailed.
98% of gun incidents pass without a shot being fired, because the crim runs as soon as he sees the business end of a firearm pointed at him.