Cat is correct. While much of what is done can be replicated by a machine-- and far better in many cases such as an instrument approach --the operations which occur outside of "straight and level" flight is where the UAV begins to suffer degradation in the operator's abilities. Why? Because despite having an abundance of data and information collected by multiple sensors and instruments, it takes a human to instantly extract what data is important, and, more importantly, how to react.
While the day will likely come where a machine will outperform a human in every situation, that day is not today. Nor is it likely to occur in the foreseeable future. A UAV operator is limited by the very information collections capability of these pilotless planes, and is further one step removed by not being on-scene, thus not giving him the big picture.
Case in point: The Commanche, a helicopter which has been scuttled by the brass, was giving the battlefield commander in simulations of it's capabilities too much information. The sheer volume of data overwhelmed not only the commanders and their staffs, but also the computers which governed threat assessments. They attempted to rig discriminators, but physical and digital, but still the sytems were feeding the commander through a firehose-- way too much stuff and no way to cull it down to managable pieces, and more importantly, determine what was significant and what was dross.
As it was, they more or less turned off many of the collection systems and went back to letting experienced pilots pass tried and true information back to the rear. This was a significant reason why the program was trashed beyond the cost overruns. As a flying machine it was extraordinarily well designed, but it was hampered by what it was being tasked to do.
Ultimately it isn't the stick wiggling which demands a human, because as I have already said, a machine, as a rule, can do that better. It's the other stuff which a machine isn't capable of yet, the threat assessment, the actions required, and a response which tilts the results in your side's favor which cannot be mimiced or derived from inside a box dozens or thousands of miles away. It's not the individual parts of flying which requires a real pilot, but the sum of which produces a greater whole via the human brain with all it's senses applying experience and judgement gained not by mere data, but through time.
Totem