Cops LOVE to be called ‘SIR’ and they love your deference and respectful attitude.
Why not... he has a gun, a badge and a uniform for a reason... to protect ME.
For the cops, it’s like having a “Dumb Ass” detector. You just got detained by a man in uniform carrying several weapons. You say “yes sir/no sir”, he knows you’re not a dumb ass. If you don’t...
No, actually, he doesn't. He has a gun, a badge, and a uniform to enforce the law, and to protect himself. He has absolutely NO obligation, or even suggestive mission statement, to protect YOU. "Protect and Serve" is just feel-good propaganda.
Ask the Supreme Court about it if you think otherwise.
YOU have a gun to protect YOU.