It's a great question. As a contractor, is the Uber driver forced to carry his own liability insurance? How much? Is Uber liable, too? What is the answer to those same questions for a regulated taxi or limousine service?
I don't have time to look up the answers because of work, but I'm genuinely curious if anyone knows. It seems like these are reasonable questions to ask, and could lead to a constructive conversation about the role and necessity of regulation.