Company SOP regarding RHS single crew ops, stop the aircraft on the runway and await towing vehicle.
There is no second tiller on the B767, so the RHS guy is limited by rudder inputs to directional steering, and then by differential braking. Safer all round to stop on the runway and wait for tow.
I agree that this could have happened anywhere, but surely the knowledge and understanding of single crewing any heavy jet must have an impact on the controllers understanding of how and what assistance that flight will need.