I've put myself in about as stressful an environment as is possible while doing said gun handling.
Are you sure about that? You can't picture anything more stressful than a USPSA competition?
Thats fair.
Do I carry? If I do, can I draw the weapon smoothly and efficiently 100% of the time? Once drawn, can I hit what I am aiming at? Now, do I seek out legal stressful environments and practice continually by putting myself in them? See, after this, I don't find the endless debates and minutiae all that important. I find, IMHO, all that to be a detriment to the task at hand if I would happen to be a victim of a violent crime. Which, we could debate statistics all day long, but the last I looked, left me feeling pretty good.
So to sum up, in a gunfight I'd want on any number of competitors I know on my side instead of any of the endless debaters and minutiae infested tacticians.
I imagine that works well if the fight you're in looks like a USPSA competition. It excludes all of the parts that come before the gun clears the holster. It doesn't address the decision to take the gun from the holster. It excludes all of the parts that come after the shooting stops. What if the fight is at contact distance?
I'm not saying you're not adequately prepared. I'm not saying competition isn't an excellent way to build shooting skills. I am saying a live gun fight might involve a wider skill set and different problems than you face in competition.