What if a child torturer is helping you save other lives and end the war sooner thus saving innumerable lives? Do you see how torture is bad but there are other variables?
You sound like those US TV dramas where the main character is a kind cop put before a dilemma to either pouch an ugly terrorist once or twice on the nose or a school bus full of cute little children will be blown up by a bomb.
Yeah, in theory, there are other variables. In practice, the chances are that if you turn a blind eye to the routine torture children you are simply an evil person.