If aiming public protection need to be qualified in psychology, social or medical carrying, why still use cops ? Qualification is a thing, but it is not anything. People are structured by their workplace. Even someone with a Phd in Psychology joining the police wouldn’t be a “good cops”. He will still have guns, the right to use violence, colonial procedure, and most importantly : we would have chosen to join the cops with the mission to enforce “peace keeping” by force, even if it’s imply starvation, homelessness our unemployment.