Earlier quoted context omitted.
Quite the opposite. The adversarial job should have higher standards of conduct, not lower.
Unfortunately, criminals aren't going to have higher standards of conduct, even if they "should". That's why we call them criminals. And the police have to deal with these people all day long--there's no easy comparison to other jobs.
In fact, you cant really call someone a criminal until they've been convicted of a crime - cue the video of the cops being called by the black store owner, punching him in the face and breaking his jaw while the white thief leaves.