> They provided a better and more cash efficient solution for passengers. That is enough.
They burned half a billion dollars a month of VC money at their peak to undercut taxis across the world; in quainter times this used to be called "dumping", now it's just the standard way of doing business. All the while basically flaunting the law with their whole "we're just a platform connecting people who happen to drive a car with people who happen to want to go some place, it's totally not a taxi guys". No regulations, no expensive licenses or professional certifications, no need even for a minimum wage or basic social security or insurance or any kind of protection. Amazing!
Essentially the same in spirit as Airbnb, only this latter had far more destructive consequences than screwing over taxi drivers.
Most businesses require sunk costs or debts, and it's also often what is required for new ideas take place in an established market. Whether they burn VC money or the bank's money to gain a foothold, is immaterial.
Uber did a great thing here and made a product that people like more, for less money. More drivers, way more global availability, more customers, and better cars, all while being cheaper. That is a quintessential success story.
If people liked taxis more, they'd use them. But taxis are still shit and the only reason we use them is because of the taxi cartel bullying weak city governments into restricting Ubers.