Everyone is entitled to their own opinion, and it is certainly OK for you as an individual to exclude exposed trigger guard revolver holsters from the list of what is acceptable to you. However, from at least the 1930s until today, the exposed trigger guard style of or akin to the Jordan was considered quite acceptable by law enforcement and non-law enforcement authorities on revolver handling, and my point was, and is only, that it is a mistake to convey the notion that the view expressed represented a general consensus.
If I had to guess (and it is exactly that), I'd say that covering the trigger guard area in those revolver holsters that did so, mainly those without thumb-breaks, had more to do with stabilizing the revolver in the holster than preventing some dope from pulling the trigger while the gun was at rest in the bottom of the holster. I'd likewise guess (same caveat) that to the extent there are any record episodes of someone pulling the trigger on a holstered revolver, it would have happened after the revolver had been pulled far enough up out of the holster to expose the trigger guard, anyhow. In short, I doubt that covering the trigger guard area in any revolver holster was ever perceived as a safety issue (at least vis-a-vis AD) rather than a stability issue.
The fact of the matter is that it is impossible -- and I say that fully understanding the absolutism of the statement -- to discharge a S&W double action revolver by having a passing object (such as a twig or branch) cycle the trigger aft. This is obviously true if the holster has a thumb break or over-the-hammer strap that has been employed. It is also, and independently, true as a function of the S&W DA revolver design.
Try this: take a S&W, confirm that the charge holes are empty, close it, and point it straight up to the ceiling. Cock the hammer. Now take a pencil with a new eraser and drop it down the bore. Now, pull the trigger and you will see the pencil jump, signifying that the pin has hit the back of the eraser and, were the pencil a cartridge, the revolver had fired.
Now, cock the revolver again and drop the pencil back down the bore again. This time, holding the revolver (pointing up to keep the eraser against the recoil shield) with one hand, smack the trigger with an object (a spoon works) hard and heavy enough to cause the hammer to drop. Watch carefully: the pencil didn't jump.
(If you doubt this, and if you know the secret of how to cock a S&W with the cylinder swung out, perform the two foregoing tests substituting a fingertip against the pin hole in the recoil shield for the pencil. The first test will smart. The second will not.)
Dan Wesson was a clever dude.
(And, oops, I see I missed another typo.)
