I realize you're addressing slightly different concerns...
* I've read a news report of
one OC guy in (IIRC) Michigan who was in a stop-n-rob when it was robbed by a feral teen who immediately went for the guy's gun & shot him with it... he died.
[
Said critter was caught, along with his accomplice, & though they were both in the 16yo range when the crime was committed, they're being charged as adults.]
* Then there's the armed robbery of a guy here in Milwaukee (MKE) a couple summers ago. Criminal held the guy at gunpoint & forced him to hand over his pistol. At the time, only OC was legal. Nobody shot.
* I've read a news report about one man near Cleveland (IIRC) who was temporarily disarmed, but another citizen got the pistol back before the criminal ran off. Nobody shot.
* And I've read an account (not a news report) of a big-box greeter who for whatever stupid reason thought it'd be a dandy idea to sneak up behind a guy who was OC & try to take his pistol. The greeter had surgery later that day. Didn't get the gun, citizen was fine, police got the real story from bystanders & security video.
Other than the one here in Milwaukee, where the criminal forced the citizen to hand over the gun (made him take it out of the holster), all of those could have been stopped by a retention holster & some situational awareness.
And compared to the hundreds of thousands of people who carry every day, these reports are nothing.