No, it's not that simple.
For the longest time, there were two categories of people who made up the bulk of the police recruits. One was the schoolyard bully type, with a pathological drive to shove people around, who gravitated towards the job so that he could enjoy himself with impunity, under color of law.
The other type was, for lack of a better term, the idealistic do-gooder, who sincerely wanted to help keep the world civilized, wanted to help his fellow man, and was motivated primarily by conscience. The genuine "officer friendly" type.
Lately, though, there's been a third type, and it seems to be prevailing. It's the "professional military" type (not in the "traditional sense" either), and the result is that police departments are morphing into paramilitary outfits.
Cold, impersonal, "you WILL obey, or ELSE" types. No "feeling", and damn little thinking, for that matter. Officer Friendly has been displaced by Robocop.
This does not bode well for society.
I used to live in Chicago, and there was another type of cop there: the guy whose dad was a cop and whose grandfather was a cop and whose uncles are cops, etc. Those guys were great. You see one on the street, you can go up and talk to them, even crack a joke. Then I moved to L.A.. Hoo boy, whole different deal here.