I would think that the logic is that if there were no drones, the US army would drop no bombs at all. I wouldn't expect them to instead start carpet bombing cities in the middle east.
Reasoning in that way, the drones result in civilian deaths that wouldn't have happened without drones.
If you take away a kid's toys, they'll grow bored and start vandalizing public property in more creative ways.
> I wouldn't expect them to instead start carpet bombing cities in the middle east.
Except that is almost exactly what most drone-apologists are threatening the US will do instead when they argue they have to use drones because otherwise, well, they'll just have to kill more children and civilians.
Reasoning in that way, the drones result in civilian deaths that wouldn't have happened without drones.