If you calculate the odds, the odds that an interaction with the police is a desired one is fairly low. You're either getting stopped / questioned / arrested / whatevered by the police when you're suspected of a crime. Or, something terrible happen and you're reporting a crime. The only 5 star experience is the tourist asking for directions, and even that is stretching it.

A restaurant provides a service in exchange for a payment. A police officer is taught to uphold the law, and interactions with the citizenry isn't like a hotelier interacting with a guest after a flight.

I'm not justifying anything the police do, or excusing anything. The case I'm making is that the metaphor of Yelp and service are just wrong. In the U.S., at least. And certainly in big cities. It's no picnic being on either side of the police-citizen interaction.

If you want to take the dim, sound-bite-and-karma-friendly approach of not really considering the argument you just read... sure, I can see how you could come to this conclusion.