In this case I don’t think that would have helped.
Darkened theater. Filled with tear gas. Body armored wearing attacker. Gunshots and chaos on the screen. Who in costume is attacker and who is just a movie viewer? I don’t think there is anything that would have improved it at the time. Probably would have added to the confusion and made things a lot worse.
I’d hope that whoever was in the projection booth would have been alert enough to stop the movie and put the house lights on... I have been singularly uninterested in the grody details to this point. But anyhow, the odds could not be WORSE with decent, honest folks packing.
I think I could make out a Guy with an ar rifle firing rapidly
Non sense had a cop been in the movie with pistol the outcome WOULD have been different
I believe to control the nuts with guns we have to outnumber them if 1 man walks into a theater with 2 guns and 20 people in the crowd had one gun each this Guy would have either died or ran not stayed to prey on the weak