Uber is basically a scam transferring money from investors to the company's pockets.
We've seen this scam happen before - the Dot.Com Bubble - when investors were told that "The Old Economy" fundamentals didn't matter any more and it was now "The New Economy" where 'potential' was worth more than 'profits'.
Strictly speaking, Uber is correct: drivers aren't essential to its business. The cash transfer from investors happens anyway. The drivers are merely there, along with the clients, as an excuse to drain investors.
Once the investors wise up, Uber will disappear like it's never been there at all, just like 'pets.com' and all those others.