Eh. Maybe? I personally want to say it has something to do with Douglas Adams principle of power:

“The major problem—one of the major problems, for there are several—one of the many major problems with governing people is that of whom you get to do it; or rather of who manages to get people to let them do it to them. To summarize: it is a well-known fact that those people who must want to rule people are, ipso facto, those least suited to do it. To summarize the summary: anyone who is capable of getting themselves made President should on no account be allowed to do the job.”

I will use myself as an example. I absolutely do not want to be a cop despite having a relatively strong moral compass, because I know for a fact that I will agonize over small things and believe most excuses thrown at me. More than that, I do not think taxpayers would want me to be a cop, because I am lenient ( which also why I did not really enjoy having a position of authority in my previous job ). I mostly assume everyone will do what has to be done.

And sadly, that is not nor has ever been the case. Uniform is just a symbol of that power.