The revolver argument is all about trigger pull. The rationale is that a slip onto the trigger is less likely to activate it. However, if the finger in on the trigger, human factors research has demonstrated that slips, falls, startles, sympathetic clutches from the movement of the other will easily pull the DA weight.
There are enough simulations and actual NDs to demonstrate this. Here's one study:
https://www.policeone.com/archive/a...s-the-finger-obey-the-brain-h5z2h6XBiLr9Ie5j/
One nasty unintended consequence of DA/SA guns has been brought up by Mas, IIRC. Recall the DA part was developed to protect against folks who put their finger on the trigger. The hope was that the longer and heavier pull might offer some protection (not against the factors I mentioned above). However, shooters who were stupidly used to rest their finger on the trigger, hoping the DA pull would protect them, would still put their finger back on the now SA pull - causing a ND.
Thus, recommending a revolver is a partial attempt to solve or reduce the problem of the untrained shooter putting their finger on the trigger. However, even some trained folks slip up on this.
I've seen enough trained shooters shoot one into the ground on the draw or raising the long arm to target. It's rare but it happens with everything. I've seen 1911s, Glocks, AR, shotgun, etc. BOOM!
Nothing beats repetition, repetition, repetition. Lord knows how many times I've drawn, safety off, dry fired my 1911. 99% of time in a match, draw, safety off, bang, hit. Once in awhile, damn safety. Watch the clock tick and crowd laugh.
Another nuance comes to mind. Most folks practice their draw in optimal, standing up positions. What if you are not like that? Guess what, folks screw up their planned, rehearsed movements in extremis and off positions. Motor memory can be quite specific. Cases in point.
Watch folks learn to find the red dot! Haha. Even really good folks - a friend who is champion level with one - BAH, Where's the dot and the stages goes to hell. Or the start position is on the ground, under a barricade, kneeling, whatever - the dot is lost. The same thing somethings happens with the classic manual safety. Start prone and have to draw (safely!), have to retrieve the gun from a box - those aren't the classic draw stroke and the safety (OOOPS!).
These factors are must be considered in a carry gun.
For the little guns - shoot matches with a J frame or a LCP, G42 with close and far targets. 50 rounds on the square range at 7 yards with no pressure - better than nothing I suppose.