There is a load of waffle about hot refuelling.
As an ex-TSW type I sort of agree with you (it can't be rocket science if they let 'mere' stackers do it) but regulations pertaining to hot refuelling of rotor a/c and those relating to non-rotor a/c are fairly different, even in the military. I can only imagine that the hill of regulations that pops up somewhere between RTRs of military a/c and hot refuelling of civil airliners is substantial and there for the lawyers as much as the operators.
I doubt the hot refuelling regs for civil airliners require said refueller to climb over a Nightsun and squeeze down the side of an in-use engine exhaust to carry out a refuel though!