I'm not sure. You can't jam the signal from my brain to my hands as easily as you jam the signal from a ground station to a UCAV.
Likewise, SA and sensation's important. We have chaps crashing the sim due to the lack of feedback; sometimes you need someone
there in the cockpit. I don't think I've seen a system which can readily replicate the feeling and view from inside a cockpit properly.
Besides, have you seen the packages needed to support a single UCAV?