So called limp-wristing IS a gun problem. It's a false issue, a hoax.
Dunno that I'd be quite so sure about that ...
I've listened to more than a few armorer instructors discuss the adverse influence that a grip instability/unlocked wrist technique can introduce when it comes to semiauto pistol functioning.
I've also had more than my fair share of opportunity to observe it occur among other shooters, and even experience it myself when the circumstances prevented me from using a sufficiently stable and supportive grip technique because of the activity involved in some shooting drill or other.
Sure, I'd have to agree that it's far more likely to occur when a less strong, smaller stature shooter uses an insufficiently stable and supportive grip technique than when a stronger shooter does does the same, and especially when a lightweight plastic framed pistol may be used at times, but I've seen it happen when a stronger shooter was using a metal framed pistol upon occasion, too. The pistol frame has to remain stable and supportive of the slide's run to the rear and forward again, especially as it relates to the timing of normal feeding.
Sometimes I've been able to induce it in a particular make/model/caliber of pistols, using a particular load, and sometimes I couldn't get it occur regardless of how hard I tried to deliberately induce it.
I remember when we were conducting some T&E with a number of different make/model .40's & .45's a few years ago. Two female shooters of similar physical stature arrived to try a G22 & G21. One of them was arguably a more experienced shooter than the other (or at least had more interest in it).
Neither had any trouble whatsoever shooting the G22. One of them, however, couldn't get the G21 to run right, repeatedly experiencing stoppages indicative of a grip support/unlocked wrist issue. Nobody else had an issue with the G21 that day, using the same ammo (same case), myself included. Maybe if the grip had been smaller in girth and she could have achieved a more solid grip and worked harder on locking her wrist. Who knows?
It can happen, though.
I've got some armorer manuals from different gun manufacturers who list grip problems and shooting with an unlocked wrist as a common cause of functioning issues, too.
There must be something to it, you'd think ... since it does seem to be an issue for some folks upon occasion.