Ever shoot a Desert Eagle? A LAR Grizzl? Ever change grips on a handgun and have it point differently? While maybe not quite as important as shotgun fit, a handgun can be fit to the user.
Sure it can. But it's still not that important, and is overall a mental state. the continued use of "fit" and "bad triggers" is nothing more than an excuse used by people who refuse to learn the gun
For close to 15 years I carried glocks and never had a problem shooting at least 280/300 on our qualification course.
I switched to a Sig and the scores were the same overall.
Sarge hit it pretty square. And I think proved what I said was more than half true.
I'm also a big proponent of uniformity within an agency.