You watch too many movies....
Respectfully, I disagree.
I own weapons that are used primarily to hunt, and they are kept locked in a gunsafe.
But I also have weapons in selected spots throughout my house which may in fact be discovered by an intruder, if he had enough time to himself in the place.
But I always try to be aware of potential problems around me, whether on the street, in a store, in traffic. I am not looking FOR problems, I am looking to avoid them if possible.
I almost always have a weapon on my person, and always have one close by. If I have been gone for most of the day I definitely give the exterior of my house a once-over before I enter, and my carry weapon is with me and accessible just in the off-chance that a threat awaits me inside.
Does that sound like a movie script? Hell, I read about those real-life scenes every day in the paper.