Well yes, but if you are in danger of being over-run by superior numbers or being burned out by people throwing gasoline bombs or whatever, you may want the option of being able to abandon your position to live to fight again later.
In that case, having a bug out bag and/or other bug out bags with food, sanitation and first aid supplies, a change of clothes and whatever else you can add to it in the way of weapons and reloads cached a distance away from your area that you can make your way to would come in handy.
I never leave the house without an edge.