Well, since you've alreadyset upthe straw man argument and framed your answer's expectations as it relates to police officers, here's a differentperspective in two parts:
1. Police officers are a member of a connected group, and if you assault one you assault them all if one gets off a radio transmission. This deters a disarming attempt for many semi-reasonable people.
2. In the USA there are not many unarmed police officers. Whether you see the weapon or not, it a very good bet that they are armed.
So believe what you want,champion whatever cause you wish, that's why the USA is different than many other countries- but I think you fool yourself if you think you have a tactical advantage as a citizen by advertising your strength to potential adversaries.
You just tell them what to do to beat you before you know the game is in play.