BGG, maybe, maybe not.
Take the case of the flying radar station. The UK approach is to take fully competent and trained ground environment personnel of suitable aptitude and fitness and employ them as aircrew for a couple of tours.
The USAF approach was to recruit airborne radar operators. The latter approach means you don't have to train them twice.
So, RAF UAV crews: take aircrew and train them twice.
Alternative: recruit them and train them once.