Ambush tactics dominate street crime, where ambiguity, deception and surprise are used to get inside your OODA loop so you cannot react effectively in time.
If I were a cocky gang banger I might want to show off and simply steal your open carry gun because I believe I can get inside your OODA Loop without you realizing it until its too late and totally humiliate you. I'd unload it and throw it back at you. What are you gonna do about it? Shoot me? That's one example of a rational person who'd be willing to attack you, knowing full well that you couldn't do anything about it.
Agreed, but you're OODA loop is internal to you it is STILL a failure of mindset to allow yourself to get into a situation that allows someone else to disrupt your OODA loop. Regardless of your current equipment or visibility thereof. If you're not alert and paying attention then it doesn't matter how you're armed (or not). You're toast. Mindset, skill set and tools in that order, you're discussing a failure in Mindset, by picking on not just the tool, but the method of carrying the tool
As far as criminal tactics go they CHOOSE to act, there is a victim selection process, no crime is random (it might seem random to the victim, but it's not to the criminal). So you have option #1 25 year old pretty white girl well dressed, nice shoes expensive shades, option #2 40 year old male in a business suit, or option #3 40 year old male, boots, jeans, jacket, and a big honking hand cannon on his hip, and a 1000 yard stare. Which one is most likely to be selected? I'd estimate that in that ambush less than 1% of the time (SWAG) the guy with the gun will be targeted, the 25 year old girl is low risk, looks like she has some cash, maybe a nice car, and has additional benefits, the 40 year old guy is low risk, looks like he has plenty cash, probably has a nice car, the guy with the hand cannon is high risk, might have cash, has a gun if you can take it and not die.
Now interestingly if the guy or girl are concealed carrying, the selection process is the same I'd estimate the attack stats are the same too (I don't know I doubt anyone knows). It's only after the ambush is triggered that it can become apparent that they are armed, but if the ambush disrupts the OODA loop of them then same as OC with disrupted OODA they're just as horked. Now if the OC guy was in the same situation but unarmed, then his likelihood of attack is much higher, because the known risk just went way down.
YMMV