Originally Posted by Rochard

Because eventually those drones have to land someplace.

You need people to design, build, and maintain those drones. You need a home base to run them out of. That home base needs to be protected. And all of those people need to be feed and need medical care. So now you need to teach people how to cook and how to give medical aid. Then you need to teach people how to supply the base when it's three thousand miles away. Then you need someone to run the base, and then someone to run the communications systems. And so on.

And that's just for drones. We also need ships and planes too.