You seem to have the believe that cops are courteous from the get go.
.......Sir, like I said, I have been stopped by this specific police force in all my years here many, many times. Indeed, from 16 to 65 with the last time one week ago (got a warning, yay!). That experience with them has taught me that some are professional and some are dumb as a post.
Now, how you make the leap from that statement of mine to “you seem to believe cops are courteous from the get go”..............I can’t fathom. Sorry.