The cost of supporting those fleet of cars along with drivers will make it non-profitable for a company like Uber to exist in anywhere except for high traffic z

The cost of supporting those fleet of cars along with drivers will make it non-profitable for a company like Uber to exist in anywhere except for high traffic zones. So the prices will go up, and it may not be as convenient. I am not sure if any research has been done in this direction, but I would be curious to know how many man-hours were saved due to using Uber, instead of waiting for cabs. The big fleet model makes sense if you are employed full time, and at that time you may as well be a cab driver, but for small places with lower number of vehicles and high demand times, the model just doesn't scale