Sure, but what is the difference between a human or a machine agreeing to the same order? Of course the human may have free will, but the majority of people ar

Sure, but what is the difference between a human or a machine agreeing to the same order? Of course the human may have free will, but the majority of people are trained to follow orders from figures of authority. It is improbable that a police sniper would refuse a hit based off of some ethical dilemma, especially when all the information they have on a situation is fed to them by their police colleagues. Heroes are rare and their presence should not be taken for granted. Counting on a human to do the right thing is almost never the right choice if you can help it.