It's actually called reality. Something that can no longer be used as a club for a weapon, because its broken, can be used as a stabbing instrument if the ends are nice & jagged, and the person can get close enough. When someone is charging you, you have EVERY RIGHT TO DEFEND YOURSELF....WITH LETHAL FORCE IF NECESSARY
That's the biggest advantage of a firearm.....it can defend from a distance, before someone can get close enough to make that firearm nothing more than a club itself. You would know this if you had ANY knowledge of firearms training and their use