Stop with the stupid nitpicking. You should already know the reason why we have humans in our war machines is that they are the ones with the authority to designate targets and deploy the weapon against the designated target.
It's not stupid nitpicking at all. If I designate Jon Doe as a target and have a swarm of drones do facial recognition the laws have to be clear enough to distinguish this from me putting a tracking device in Jon Doe's pocket and have a missile home in on that signal.