Lol I am the worst offender of that, I learned to pistol shoot using the Army 1911 training video.
I swear I am the last of the one handed pistol shooters. I do pretty well with it, and it helps keep the hammer bite from the old guns I have away. I know the modern two handed grip is probably better, but I shoot worse that way, and that grip invites hammer bite on a lot of the old guns I have about.
My father is a one hand handgun shooter. He's very good at it. I was trained for two hand myself.