Maybe, but the problem is that in a restructure like this the high performers often leave in protest to the culture problems that a restructure creates and austerity measures.

Often though they don't cull low performers, they give each department a budget or a head count they have to hit. A department made up of high performers will have to cull a high performer to hit budget, a department which is overloaded will become more overloaded and people will quit in response.

In a company the size of Uber a restructure is often a pretty blunt instrument.