>In the real world, you can't "fly to this GPS point". If this were possible, we would have automated airplanes and pilots would be out of their jobs.

These things don't follow. We actually do have automated airplanes and pilots jobs are really just there for passenger comfort, but that is because Autoland and autopilot utilize ILS' and other sensor data besides GPS to make it precise enough.

So while your point about GPS alone being insufficient for precision delivery is correct, the overall thought that we can't do precision delivery is misguided.