An interesting argument and one that from "over here" could be a contributory factor to the issues raised here.

Here is a key passage:
Under this warrior worldview, officers are locked in intermittent and unpredictable combat with unknown but highly lethal enemies. As a result, officers learn to be afraid. That isn’t the word used in law enforcement circles, of course. Vigilant, attentive, cautious, alert, or observant are the terms that appear most often in police publications. But make no mistake, officers don’t learn to be vigilant, attentive, cautious, alert, and observant just because it’s fun. They do so because they are afraid. Fear is ubiquitous in law enforcement.
Link:http://harvardlawreview.org/2015/04/...rrior-problem/