Carrying a single action cocked and unlocked?

The trigger pull on a single action is usually MUCH lighter than on a double action, greathy increasing the chances of an inadvertant discharge.

The trigger on a single action, at least a normal carry, isn't a lot lighter than a "safe action". But, that's why I don't carry Glocks! You have a couple of redundant safeties on a 1911, but that manual safety adds to it and makes it, to me at least, safer than a Glock to carry. I don't carry a single action either, but I have and I don't feel it's unsafe in condition one if you train with it and know the gun. I just don't trust "safe action" for CCW carry. Lots of people do, but I'm not one of 'em.

Personally, I carry true DAO or DAs or revolvers. Part of the reason I don't carry an SA gun is that I like to keep it simple in my practice. I like to carry guns with a similar long stroke of the trigger for the first shot, no safeties. DAs and DAOs are safe to carry hammer down. On DAs I prefer a decocker that returns to fire position for carry after decocking. Simpler the better. DAOs and revolvers are the simplest of all. But, I can see why lots of folks prefer the SA. The safety is NOT a big deal, either. It's right there at your thumb. On my old Hardballer, it came with a large safety that made it easy and natural to swipe off on the draw. Didn't slow you down one bit if you practiced with it enough. I shot pins with the gun, was excellent for that. I carried it some afield, too. But, there was no CCW law in Texas at the time. I might have carried it IWB if it'd been legal to do so, but it got stolen before the law went into effect and I never bought another SA. The Hardballer didn't have the firing pin block. I'd really prefer a series 80 if I'm going to carry a 1911.

the Glock is essentially a single-action handgun with no safety

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no.

Because a glock isn't really cocked until the trigger is pulled to the rear.

If, through some miracle, the striker were to fall off the sear in a Glock, the spring wouldn't have enough energy to fire the cartridge.

On a 1911, it is posssible for a hard bump to knock the hammer off the sear, especially on a gun that has had the trigger pull lightened via a smaller sear engagement, or lighter sear spring. You then have a fully powered hammer on it's way to the firing pin. Hopefully, the half cock notch will catch it...

Single action autos have comparatively light trigger pulls AND very short trigger pulls.

The Glock has a heavier, longer trigger pull, and it DOES have a safety.
The small lever in the trigger face prevents the trigger from moving back unless the lever is pulled first.

A single action trigger, minus any other safety device, requires only a short, light pull to fire it, PLUS there's the matter of much finer sear/hammer engagement.
A good bump COULD cause the sear to jar off and allow the hammer to drop.

When a single action auto is cocked, the action is "armed".
These were specifically designed with a safety to prevent firing of a fully "armed" trigger action.

The Glock is a "semi-cocked" striker system in which the trigger completes fully cocking the striker.
This pretty well prevents any chance of the sear jarring off, due to the larger engagement surfaces.
Since the action is "armed" ONLY when the trigger is pulled, it's an entirely different proposition.

A cocked single action is fully "armed" and ready to fire, requiring only a light, very short pull to fire it.
The Glock is NOT fully armed and requires the trigger safety to be de-activated and a longer, heavier pull to complete the arming sequence.

Oh, my! Let's dispense with the arcane technicalities of whether a 1911 or Glock is more prone to discharge if subjected to a light breeze.

The vast majority of accidental discharges occur when the gun is being held and a finger is on the trigger. The main differences between 1911s and Glocks in those situations are that Glocks generally require more pressure on the trigger and a longer trigger pull, while 1911s have the option of engaging a manual safety.

The first safety precaution for a 1911 or Glock (or any other handgun) with a round in the chamber is to keep your finger away from the trigger.

BTW, a Glock with a 3.5 pound trigger connector looks pretty dicey to me.

Yeah, I might consider a Glock with an 8 pound trigger, but in a holster that completely covers the trigger and is made of stiff leather or Kydex or something that's not flexible.

On a 1911, it is posssible for a hard bump to knock the hammer off the sear, especially on a gun that has had the trigger pull lightened via a smaller sear engagement, or lighter sear spring. You then have a fully powered hammer on it's way to the firing pin. Hopefully, the half cock notch will catch it...

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You ignore the grip safety and, on Series 80s, the firing pin block. But, to the extent that I'd never carry a single action with the safety off, we're probably in agreement on that issue.