And that doesn’t even begin to address the vast number of defensive uses of arms that don’t involve firing the weapon. I have had one of those, and I don’t show up in any statistics - to the contrary, it prevented me from landing there in some manner.
That probably happens even more than actual shootings.
Or those, where a crook decides against a crime because someone is observed to have a weapon, or because the crook correctly believes someone has a weapon, or because a crook decides it's likely that someone has a weapon. In many such cases, the person with the weapon (or who was believed to have had one) might be entirely unaware of the crooks' aborted intentions.