There's obviously cases where prosecutors or bureaucrats in general go way beyond what they need to do in which case individual responsiblity or morality matters, but in general lawyers and federal employees
apply the law, they don't make it. What you identified as relativism I think is actually impartiality, which is a good thing. The problem with principles, like empathy is that they tend to be unevenly applied, often in activist manner. Which is why we demand of officials that they follow procedures, rather than inherently subjective judgement.
I think at the end of the day when it comes to stories such as Aaron's the buck stops with everyone of us, because we're responsible for keeping these people employed and the rules in place.