and before anyone asks it is not that common for the tug to be in contact with the aircraft during a towing operation.
If you meant to say that while towing an aircraft it is not common to be in contact with the flight deck brake-rider or flight crew, where in the world do you work? What are headsets for?
Edited to add that I'm not talking about jockeying bizjets around an FBO ramp, but moving commercial heavies around without tug-flightdeck comms is nuts, and at my home base, if you don't have comms due to APU inop or whatever, you get an Airfield Ops escort.