If safer is a realistic outcome, perhaps things would further evolve. Ride share cars today are dual-use vehicles that typically carry driver + no passenger or driver + one passenger with the capacity for 3-5. If future autonomous ride share cars turn out to be dedicated to ride share, maybe most would end up being 3-wheel with just one or two seats. Shrinking the size of a substantial potion of cars on urban roads could be beneficial to road safety, power/carbon intensity, road capacity/density (which could also lead to more equitable road use for bikes and pedestrians).
Perfect is the enemy of good. There is no scenario where cars are getting banned in most of the world where EVs are being sold.