Professional gun handlers? I don’t think so. Most all of the shooters I’ve shot with rigidly practice proper gun-handling, or I correct and instruct them upon my observing their error. Not that I’m a stickler for detail or such.
If I’m around shooters that don’t follow all four rules of firearm safety (they don’t have to wear hearing or eye protection, it’s their eyes and ears), I never shoot with them again.
That is a pretty wealthy area. I doubt they discharge their service weapons all that often. Got sloppy on training obviously.