I'm not naïve enough to think that bogies never run in multiples, but let's compare apples to apples.
I am a civilian. Not law enforcement.
I am not going to do stupid things that put me in unsafe environments. It's that simple. That means I am unlikely to encounter multiples, and if I do, it's because stuff has really gotten bad out there and I need much more than a handgun. I am not the tip of the spear. Other guys fantasize about that, and that's fine. But that's not me. I believe in tactics first, all else is second.
Your most important and deadliest weapon is the six inches between your ears.