A sharing economy works when you have a lot of like minded people in the same social circle. Once you invite the masses and investors, you lose what made it work...
How can a driver be in the same social circle as a well off professional? At the end of the day, very few industries are peers between worker and client.
Though the first drivers in Chicago were Hipster Musicans, which were fun.. similar culture to yuppie coders. But over time, it has moved to more and more recent immigrants who do not speak English as a first language.