Why not?
Rules/Regs. Just because it is a military base doesn’t mean
a lot of personnel are carrying loaded weapons.
During my Air Force career, I was never allowed to operate aircraft, although most civilians I met assume I did, because I was in the U.S. Air Force. I wasn't trained, it wasn't my job.
I flew a desk. I provided valuable information about aircraft to those whose job it was to operate them, maintain them, and manage the fleet.