Jaxon,
Absolutely true of course, that's one way of looking at this complex subject. But the bad guys (and I include here not just the 'professional' terrorists but those misguided individuals and small cliques who might be less well informed but seem to outnumber them and therefore have more opportunities) have learned not just the weapon type but when and how the weapon is carried by the pilot, when and how it is removed from the person, and how non-gun-carrying pilots react to its presence.
We are told that there is a 'war on terror'. In a war you do not tell your enemy what weapons you have and how you deploy them.