I've seen you use that same argument before about " You don't announce " to the store clerk that you are armed when you enter his convenience store... Your comment makes for very thin bowl of soup......
the reason?
when you are stopped by a cop, you are already a suspect... you either broke the law... or were a suspect in a similar car, and a possible alert for a murder or a robbery or some other crime. Its the cops job to check out, a law breaker, or follow up on an alert. If the cop stops you, he is already " ON guard "..
When you walk in a convenience store.,.. the clerk does not stop you, or goes on alert because you broke the law when you enter his store, so there is not reason to tell him anything...... So please don't use that " tell the merchant you are armed " when you enter his store to get a coffee, retort... An Official police stop, and a Mini Mart coffee stop have absolutely nothing in common.
Every time a cop walks up to a car, he does not know for sure, who is on the other side of the window, other then he broke a law, or is a suspected criminal, or in a car of similar description, who just committed a crime.
I think most of us have seen cops being shot, at a car stop, when captured by dash cam. That's a guy putting his life on the line every time he walks up to a car door, to try to keep the streets safe for you and your family. If a cop works the highways, he makes a few stops every day... if he works 20 years.. that's a lot of potential lethal situations.
A city cop walks into high stress situation daily, domestic violence, street crime, drugs, gangs, in an effort to make the town, or city they live in, safe for their own family. That's the reason most cop, seek that career.