The causes in this case are myriad and complex. I should have said “By only pointing to the external cause…”. By ignoring the non-external causal factors, you appear to be trying to shift blame from failure of police themselves to some external factor. Which is victim-blaming.

And, yes, nobody cares about any cause of a problem unless it helps coming up with a solution. If a system is complex enough, it is not logical to insist on analyzing it exhaustively to find all the root causes; it is more expedient to fix the problem some other way. And this is not even what you were doing; you pointed out one external factor and highlighted it, implying that the blame and the problem must be fixed there.