Sure, it does. But what happens when it goes wrong and the anti-missile missiles are launched against a sub-orbital passenger jet whose transponder has gone wonky?
People will die. Just like when more people died when cars didn't have safety belts and windshield wipers. Things will go wrong. We will fix them (eventually).
When people list problems, I see temporary obstacles. Even mountains can be overcome: http://www.odditycentral.com/news/dashrath-manjhi-the-man-wh...