Good home defense is quick access to a gun. That usually takes more than one gun place around the house.
This strategy still baffles me. How do you secure all these various guns at night when you go to sleep? If you leave guns more than one place at night and a perp comes in and finds one of them, you have just violated the sacred maxim "never give your enemy ammunition". I've never understood the idea of leaving a shotgun at the front door and assault rifle at the back door and a handgun in the study, all there just waiting for an invading perp to find so he is well armed while he approaches your bedroom. I don't get this. I really don't.