A long time ago, maybe 40 years ago, as more mailmen were women and felt they were running into trouble, the USPS wanted to issue guns, few of us regular people could carry then, and many tens of millions of us can’t yet.
When I first got my pilots license you carried a gun if you felt it was appropriate. The pilot in command was the ultimate authority. No arguments, questions, politics, or other associated bureaucracy needed be consulted.
Mail carriers are the eyes and ears of every neighborhood. They know everything about everyone in their route. Used appropriately that is a good thing. Used for bull$hittery
nefarious purposes like voter fraud by their superiors, that’s a bad thing.