faustulus:
If I may make so bold as to offer a POSSIBLE explaination, did you ever come across the phrase PISSING CONTEST, or perhaps EGO TRIP? I believe that one and or the other will serve to explain.
I generally shoot IPSC. I use one of two pistols. In Limited Ten, a 1911 type pistol, single stack, with 10 round magazines. In Production, I shoot an old Star Model 30M, 9mm "classic" double action , magazines loaded with 10 rounds. 1911 is Major, the 9mm is Minor.
In IDPA, I would shoot either of the above mentioned, without problems. Oh, once, I was "called" on my holster, it was an old Rodgers-Hackenthorn, no longer made. I believe that the guy who kicked up a small fuss lacked anything better to do at the time. Nobody else seemed to care.
Essentially, IDPA requires pistols or revolvers that one might actually carry on the street, along with same type of holster. Compensated handguns, with large optical sights aren't really practical for street carry, though they might be fun to shoot. It all depends on which type of game one chooses to play.
Enough said.