Again, your assuming operating the drone in an environment of air superiority. Smaller drones are not as "useful" as one would think. And the larger drones with longer loiter times are the size of small general aviation aircraft. Add in an enemy with any sort of cyber capability and your drones are at risk. The biggest mistake of modern "superpowers" (i.e. the US) is forgetting history and lessons learned. If the enemy goes stone age we don't have crap to counter it. Drones should support and supplement boots on the ground, not replace it.