You made a great point. Truly for a great engineer, Uber should't be the only place. I am sure very soon those good bright ones will leave the place. Culture is very important for an Organization where -- "meaningful work and meaningful relationships that are obtained by striving for truth and excellence with great people" Quote from Ray Dalio's https://www.principles.com/#Part-3

It takes a lot to build an organization and from how Travis ran Uber there is no sustainable effort in that direction.