What good is the gun doing in their car? Are they going to leave, get their gun, and come back? That is almost certainly illegal, and stands a very good chance

What good is the gun doing in their car? Are they going to leave, get their gun, and come back? That is almost certainly illegal, and stands a very good chance of shooting the wrong person. That's why the gun is in the car -- it's not allowed into the school. Their top priority is the children in the room, which usually means sheltering in place. If it were easy to get the children out we wouldn't have mass shootings in the first place. Are they going to leave the kids alone while they fetch their gun? They may like the idea of playing the hero, but there is basically zero chance of that. There is no opportunity to get their gun and a billion problems with using it if they had it. It's a comfort blanket, not a tool of protection.