Yeah, so terrible and confusing that they didn't mention guns in branches that don't have anything to do with guns outside of a gun fetishist's fanfiction.
So, I can imagine someone with a gun menacing the attacker at gunpoint and forcing them to surrender. No shots fired.
But the data doesn't include this for bystanders. Maybe that's because it doesn't happen in real life, or maybe they muddied the watters. We can't know because we can't see the data they used to make this graphic.
For practical purposes imagine yourself in a public area with the gunman actively shooting people with an AR-15, to the left of you a guys head is turned to mush, down the way someone takes a hit to a limb leaving their arm dangling in an unnatural way. All around you are dead and dying you ignore the pistol in your pocket and run at him screaming "I'm going to take you down brudder".
The people who subdued people without shooting them probably didn't have a gun.
Not all shooters are blindly suicidal. They can be menaced with a gun and told to surrender. Yeah, in some situations it won't work, but in some situations it will.
42 incidents. Not even one of them used a gun to force a surrender? Hard to believe.
It's incredibly easy to believe. Many people own guns most of them don't go around armed literally all the time. Fewer yet are going to get in a gun fight to the death with a shooter who is actively killing people all around them. Of those willing to do so basically anyone with even half a brain is going to take the shot. By the time you have yelled "drop the" they have enough time to bring the gun to bear on you. It makes more sense to execute you than comply.
42 people choosing to risk their lives while unarmed is also pretty hard to believe.
Also, your claim that surrender is a fantasy contradicts the fact that a bunch of shootings ended in surrender to the police. I think that strongly implies a bystander with a gun could achieve a similar result.
Basically you doubt... reality and want to somehow assign credit for guns you hallucinated exist even when people used their feet and fists. Face it random joe with a gun saving the day during a mass shooting is so rare as to be non-existent. Good guys with guns are basically worthless in such misadventures.
If we look at home use is even dumber. Having a gun in the average house increases your chance of death.
What I doubt is that, of 42 people who stopped a shooter, literally zero of them used a gun to nonviolently deescelate. Zero? That's definitely possible, I'm not arguing against that. What I'm saying is, because the data isn't organized well, it's unclear. It only says that they subdued the attacker without shooting. That does not indicate that they didn't have a gun.
Sometimes, rarely, you can stop a bad guy with a gun by just pointing a gun at him.