Couple of things.
Our country will not accept deaths in our military.
The drag on airplanes is mostly due to putiing a person in the thing. Make them pilotless and they can be made faster, cheaper etc.
And some game boy pro can sit half a world away safely.
Do i like it? As a pilot, NO.
Right now the UAVs are good for Surveillance, Reconnaissance, and surface attack missions. I think it will be awhile before they're capable of Close Air support and Air to Air missions.