@Simon sorry brother you are categorically wrong. Years ago some guys tried to break into my house. I chambered the weapon they heard it and they were gone.
Perhaps you think chambering my super soaker would have had the same effect. I disagree.
Obviously ribbing you a bit but in all seriousness when used responsibly it can absolutely protect you. That said and I'll readily admit many have no clue what they're doing. Most choose the wrong weapon for home defense for example. A pistol is the worst thing. Get a light 20 gauge shotgun and teach the wife. She'll be able to handle that. Too many get pistols without any training and can't hit the broadside of a barn in a hostile situation.
Again though when used by intelligent, responsible people they can absolutely save your life and in fact did mine.