You're sitting on the couch watching TV when 5 guys crash through your rear slider and you have 3 seconds before they are in your living room with you. What do you do? Is the element of surprise and disparity of force too much to overcome? Do you wait until they separate to search the house before drawing and taking down the one or two in sight, hoping you can escape into the night with your family?
Layers! Lighting outside, cameras outside, burglar bars, alarm system, rotweiler, and finally my family. I have given us an ounce of prevention plus the time to identify that we are under attack and acquire the defensive tools needed to repel an attack.