Sure, but again a company with Uber's money and network can afford to explore creating such a service, without having to fold before they can. More, they could

Sure, but again a company with Uber's money and network can afford to explore creating such a service, without having to fold before they can. More, they could sustain it, and generalize it to a network of "Trusted drivers". So, to me, it seems much more viable as a sub-unit of a larger company.