...the three safeties thing sounds like marketing...
Whatever you want to call it, it was convincing enough to convince nearly 3/4 of U.S. LE (at one point in time) to arm their officers with a gun that was to be carried chambered and without a manual safety.
It was enough to convince just about every other major firearms manufacturer that it was acceptable to design semi-auto pistols without manual safeties.
The doo-dad just bugs me.
It bugs a lot of people. It bugged S&W so much that they came up with a slightly different trigger safety to perform an identical function. It bugged Ruger so much that they tried to come up with a different solution for their SR9 but failed and had to go back to a design that was essentially identical to Glock's trigger safety.
I believe the gun won't go off unless you pull the trigger. I kind of expect that from a gun. I don't call that a safety.
You're entitled to that opinion but it puts you in a very small minority.
As I mentioned earlier nearly all firearms manufacturers design similar safety features into their firearms and call them safeties.
I'd say the one safety on a Glock is the holster
You're really making up your own vocabulary here. A vocabulary where holsters are safeties and safeties aren't safeties...
I'm just trying for clarity.
I'd say you're not quite making it.
Look, you started by saying it did nothing. That turned out not to be true. Then you changed the argument to saying that you didn't think what it did was anything special. Maybe it's not, but that's another argument.
I think the real issue is that you simply don't like the trigger safety. That's fine. Personal preference is a wonderful thing. But trying to justify personal preference with bogus technical arguments (
it does nothing), bankrupt logic (
I expect a gun to be safe when the trigger is not pulled, therefore the means by which the designer achieves that end is not a safety) and by redefining commonly used terms (
safeties aren't safeties but holsters are) is another thing entirely...