I suppose I should have limited my claim to police - the anecdotes abound there. There is SWATing, which can be deadly, there are stories of cops getting fired for NOT killing the suicidal person waiving a knife, etc. But with the military I was thinking more of pilots, drone and otherwise, who's whole job is to kill stuff from afar. How can they show discretion?

But yeah, maybe a marine on the ground has more discretion than I realize. The other cases, though, I think are valid.