Unfortunately, no, they're not supposed to provide "well paid" driving jobs. They provide jobs. 

Second, you've missed the entire bet: build brand recognition, invent autonomous vehicle, fire workers, use robots, $$$$$$$$$$$$$$$$$$$$$$$$.

Why do you think private equity is valuing it at 70 billion? 70 billion could buy every taxi company in America 2 times over. Imagine a company where all you have is electric, autonomous vehicles, that get repaired by service people at a garage, with the rest of your staff being STEM people improving the software. Add in a few customer service reps to review complaints through the apps, and it's a slam dunk for efficiency, IF they can pull it off. Unfortunately, all drivers will be losing their jobs in the next 20 years, that's the downside.