Uber and Lyft drivers could see their earnings take a hit if Waymo One's robotaxis continue getting access to airports.WaymoWaymo One's robotaxis could threaten Uber and Lyft drivers' earnings if they get access to airports.Airport rides are among the most profitable trips for human drivers.Waymo One is offering airport trips in Phoenix and is awaiting approval in other markets.If Waymo One's robotaxis continue expanding to airports, human ride-hailing drivers could see their incomes take a big hit.Airport trips are "incredibly important" for ride-hailing drivers, particularly those who work near cities with major airports, said Lindsey Cameron, an assistant professor of management — whose research focuses on AI and gig work — at Wharton School of the University of Pennsylvania.