Lets select "this spot" as the primary arguing point, okay?
Uber has one job. Connect riders with drivers.
The "libertarian" solution is to provide a marketplace where drivers can sell their services to riders. Drivers can compete against each other by raising or lowering prices, while riders can compete against each other by similarly increasing or decreasing the bid.
Uber pretends to do this, but with a distinct difference. Uber sets all the prices. Therefore, Uber is anything BUT a free market.
Maybe you don't get it because you haven't been paying attention to Uber marketing. But I'm not claiming that Uber has no competitors. What I'm saying is within Uber's "marketplace" of "independent contractors", the drivers and riders are in fact helpless to Uber's pricing whims.
Uber is NOT a free market. But they are trying to market themselves as one. This is a distinct reason why Uber drivers have been declared to be employees.