Hailed riding only works locally, and there's already public transit cheaper than ride hailing; if you leave your metro area at all i'd bet this assumption that ride hailing is cheaper quickly falls off.
Where public transport exists, sure. But that's only in metro areas, and even then it's on a timetable that's less convenient than hailing a car. It also requires a bicycle or a long walk to travel from origin to departure, and from arrival to destination.
Everybody will still own their car, and use it just for long-haul trips. Daily commuting to work could be cheaper in a hailed (electric) car than driving your own (gas) car.
Hell, many US cities don't even have uber yet.