DMM, You are right. It will be a horrible experience to know you have killed someone....but sometimes things like this have to happen to let the crooks know that people are responsible and armed. Quite often the crooks take what they came for and then take the life of the store or business owners too. Maybe armed is the best way to be. I really don't know.
I do know that when I was selling guns I was always armed...and still am usually but I really don't like to be. Hell of a thing to have to go armed at your own place..