Just like we have international treaties for other horrible things like mustard gas.
Do all the reconnaissance you can get away with. But I don't want a tired, overworked, morally disconnected 20-something sitting in a trailer somewhere in the US, pulling a trigger to kill unquantifiable targets anywhere in the world. Or any other country doing it to anyone else for that matter.
From a political point of view, drones are much more attractive than traditional methods. You won't see the corpses of dead Americans being dragged through Mogadishu with drones. You won't see captured pilots being paraded in front of a camera with drones.
In any case, I remember it fairly well, no need to look it up. Which current likely target is a heavily-armed state with a strong air defense system?
(North Korea is a possibility, although I have to wonder just how good their air defenses are these days. It also strikes me as a target where drones would be a great idea if it ever comes down to a shooting war.)
I'd also like to note that the F-117 shootdown didn't involve the pilot being captured, much less paraded in front of a camera, although he certainly could have been.
Modern fighter pilots can be just as overworked and have about the same risk of dying from being shot at.