It is way cheaper because majority of Uber cost is the driver.
That is only true because Uber doesn't have to pay for buying and maintaining the cars in their 'fleet', having offloaded that cost to their drivers. If Uber were to move to owning robotaxis then they have to have to move the car ownership costs back onto their books.
But sure, as long as other take all the costs and most of risks away from the new liberatrian tech nobility we are suppossed to not care about those little things, right?
That is only true because Uber doesn't have to pay for buying and maintaining the cars in their 'fleet', having offloaded that cost to their drivers. If Uber were to move to owning robotaxis then they have to have to move the car ownership costs back onto their books.