The window between "teleoperated robots to fuel airplanes being economically viable" and "autonomous robots to fuel airplanes being economically viable" is probably too small for teleoperation to become a big thing in general.
(Be sure to ponder the full meaning of "economically viable". As you say, teleoperated robots to fill gas tanks are already possible today, but clearly they are not economically viable in any but the most expensive of situations because humans are still cheaper.)
You hire a remote guy to fuel the airplane watching the cameras and gauges and signing off personally on delivering certain amounts to certain planes following certain safety procedures and documentation procedures including everything being automatically recorded. And if there is a screw up then you can initiate legal proceedings (well, not if you outsource, but if you teleoperate in the USA it would at least be possible).
With a fully autonomous robot then the first time there's any problem, the deep pockets robot mfgr will be sued out of existence regardless of having anything to do with the problem other than having deep pockets. Only in business until the first airliner crash, and not a day longer, even if it has nothing to do with fuel.
In a way I'm talking myself out of the idea, because non-teleoperated can't be documented for all eternity like remote work can be documented. So the remote fueler is on camera fueling up a jet without commenting on the obvious metal fatigue crack far in the background that a monday morning quarterback knowing what to look for can see if he ignores the fuel dude's job and zooms in on finding the wing crack... this is a legal problem that non-teleoperated doesn't have.
I think with lots of things, there is not enough volume and cost relative to personnel to justify the R&D and ongoing operations. For quite some time you would still need an operator and there is always the edge cases that a human can deal with on the fly that the robot cannot.
Bottom line, the world needs a finite number of plane refuelers and they are cheap. No need to replace them anytime soon.
But yes, technically possible at this point, I would agree.
