A good guy with a gun stops a bad guy with a gun, and doesn’t even fire a shot. The antigun left won’t count this as a “defensive gun use” but it certainly was. You don’t need to fire a gun in order to use it in self defense.
Note how they stress that the hero was an “armed veteran” who “grabbed his gun, chambered a round, and rushed outside to assist.” They can’t admit that a CCW carrier could possibly do anything good, unless they were a veteran who kept an unloaded gun around.