Your examples sound like they are practiced and have been for years. So we are not talking about them. I have not said anything yet so whatever you are hearing is not me. In the grand scheme what does my opinion or anyone else's really mean?I dunno Aron. I mean, I'm not trying to be a pedant. I'm really not.
But I do know some people...admittedly in the 1% or less of the population...that really don't need to practice specifically with the pistol (or pistols) they choose to carry. Most of them probably do, but damn...some of these guys can shoot ANYthing well. Hundreds of thousands of rounds downrange will do that to a person.
One particular gentleman, if faced with a Glock on the shooting bench, could probably shoot it more fluently than round about anybody else, regardless of WHOSE Glock it was, or WHICH Glock model.
Does he really need to practice a whole bunch with the Glocks he elects to carry for personal protection? Unlikely.
Same for the 67 year old that has been shooting tens of 1911 pistols for 57 years, in competition and in Service, and has one proven beater that he prefers to carry in the glove box all the time. Does he need to shoot 4 boxes a month with that particular pistol to know that he can make hits with it? Unlikely.
I grant that you are here on an internet asking questions, not making statements (a bright move, so to speak), but I hear you more-or-less saying a broad statement that everyone does. The trouble is there are almost always exceptions to any rule, not that I am one.
-Nate