Blame it on the third grade! It all started when teachers pasted those little gold stars next to your name on a wall chart for certain accomplishments. The more gold stars one had showed that they were smarter, brighter than the rest of the class and those little stars gave one a sense of accomplishment and superiority. Some have strived for that feeling their whole lives, and simple things like correcting others gives them that feeling, others could care less.
Can you just imagine the conversation among car guys when talking about their favorite cars and the talk shifted to the '57 Chevy only to have someone correct the others by saying that technically they were Chevrolet's and there was no such thing as a Chevy! There would be tar and feathers made ready Personally, in my hot rod days I had an Olds 442 (very similar to the Oldsmobile 442 but I never had to explain that since everyone knew)
Regardless of what we call these guns (Oops, I mean handguns or revolvers or single action revolvers) at least we know what kind of bullets we load in them (Oops, I mean cartridges or rounds or ammunition (is ammo still acceptable?)) Ya gotta love it!