And for that matter, laypeople who don't take muscle memory training think they can operate successfully every single time. The security Guard working at Tops grocery store was a retired Buffalo police officer, and he still died. So I think it is even more likely someone with even less training and practice would meet the same fate.
Conversely a man in California tried to shoot up a Presbyterian church, and while he did unfortunately killed someone, the folks there disarmed him without guns and tied him up with electrical cords and sat on him until the police got there. So having a gun isn't a guarantee of success 100% of the time.
Conversely a man in California tried to shoot up a Presbyterian church, and while he did unfortunately killed someone, the folks there disarmed him without guns and tied him up with electrical cords and sat on him until the police got there. So having a gun isn't a guarantee of success 100% of the time.