That's because in real life there were no fast-draw duels. It's all a Hollyweird invention. Which disappointed me deeply when I read historic accounts of the old west when I got older. There were a lot of people good with guns, but when they wanted to dispatch someone, they had their guns already drawn and pointed at the bad guy. And no shooting from the hip either. They aimed their six-guns if they wanted to hit anything.
I can think of one man on man shootout in the streets of Wichita.
It involved Wild Bill Hickock. Probably wasn’t a quick draw tho. Hickock killed the other guy at a long range then turned and killed his deputy who was coming to his aid. I think this haunted Hickock for a long time.