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.
Good for you. Meanwhile at my home base every single towing operation is done with towbar-less tugs and by a single person. As in, the one driving the tractor. This also includes towing which enters the manoeuvring area and crosses active runways. Single-man is also how the vast majority, say more than 75%, of all push-backs are performed. And it's not just us, that's how every single airline and ground handler does it.
Operators across the airport have done it like that for more than a decade, yet to have an accident.
Different when you're using a towbar though. Then you need someone riding the brakes, but there are no requirements to maintain intercom contact. But nobody here ever uses a towbar for towing anymore, just for push-backs.