No, when you adopt that is a requirement of the home study. Moreover, the odds of a grease fire in your kitchen, while not high, are far greater than the odds of ever being the victim of a violent home invasion. I also keep a shotgun in the back of our bedroom closet with shells next to it. The rest of my hunting guns I keep down at my dad's in rural Arkansas because chances are if we ever were robbed, it would almost certainly be when no one was home, and all that having a bunch of guns in my house would accomplish is getting a bunch of guns stolen.
My point was the scenario described in the opening post was a silly one because its so extremely rare for such a thing to happen in the vast majority of neighborhoods. Of course, if a violent home invasion were to occur at my house I would want to be armed. Who wouldn't want to be. Similarly, if God exists and decided to punish the world with another great flood, I would be glad we have a canoe. The latter scenario only slightly less likely than the former.