the ol' people swear by it, partially because they're used to being right.
I got into a debate once and told them about the clear advantage that the sulg offers. They never argued, but explained that they way I was thinking of using the buckshot is wrong. It was supposed ( they said) to be shot specially at running game, and aimed ath the front legs, from up close only, followed by a lively walk to the game and finishing it....
Weather this is true or not, I do not know, as I never used buckshot on anything but paper so my experience is less than limited.
Things changed a little bit as far as the hunting ethics in the past years, and the tradition of using buckshot / was largely used in Europe until a few years back... they hunt mostly drives.... it makes more sense that way.