I have a lot of negative feelings about Uber, and I would never work there myself as a SWE, but these feelings pale in comparison to my experiences with yellow cabs (NYC bias here).
I've had my partner be threatened (the usual pay cash/credit card machine broken or "better be a good tip"), cabs drive right pass after asking where you're going, scammed. I've had female friends molested by drivers.
Sure, all this could happen (and some have) in an Uber. But I'd bet dollars to donuts that Uber can track down the driver must easier than your usual taxi driver. (Who the hell remembers the medallion numbers?)
TK is an asshole, and I'm no fan of assholes (e.g., screw Apple products). But if he was the price we have to paid to upend the yellow cab industry, then I for one am willing to pay it.