And you know this from your research into gunfights? From my research you find that it is not uncommon for people with little firearms training and no gunfight experience to defend themselves effectively and to even capture and hold their attackers without having to fire a shot...happens all the time...every day...
Have you studied the dynamics of mass public shootings...how people at the scene...even without guns...and no training can subdue a mass shooter....how would you explain that?
Mass shooters, in almost all cases, when confronted by armed resistance...and this doesn't even mean someone actually shooting just pointing a gun at them, either commit suicide or surrender...columbine, the colorado shooter, and any number of attackers killed themselves or gave up as soon as someone with a gun resisted them...
In fact...they are beginning to adapt...the one guy they captured before he launched his attack was planning on killing the police liaison officer first...because he was the only one on the campus with a gun...he figured he would kill him first and then it would take the rest of the police minutes to arrive...while he could spend that time killing unarmed, defenseless victims....
It is also in the studies that someone on the scene of the attack who resists the attacker with a gun reduces the number of dead victims...
Remember the Doctor who broke the rules and carried his gun to his office on the Hospital grounds that were a gun free zone? Remember...the nut job who killed the secretary brought his gun into the gun free zone and was killed by the Doctor before he could keep killing.
How much combat training did that Doctor have when he killed that guy? And yet, he effectively used his pistol.
Doctor Who Ignored Gun Free Zone Signs May Have Prevented A Hospital Massacre - Bearing Arms
I would list story after story of old people, alone, and under assault who also used guns effectively...I just don't have the time....
And how much training do you think they had before they had to use the gun to stop the violent criminal?
Your beliefs just don't hold water in the face of reality...
Guns save lives...every day...and they save more lives than they take at the hands of criminals...11-12,000 gun murders...vs...250-370,000 lives saved and crimes stopped with guns each year...(and that is on the low end of the studies into people using guns to save lives and stop crime...some put it at 600-700 thousand lives saved and crimes stopped and one reputable study puts it as high as 2.5 million times a year)
Guns save lives...every day...