Fair caveat. I'll just re-iterate that taxis are really fucking expensive. So expensive, IMO, that cost becomes the most significant factor in utilization.
Definitionally, only a small chunk of the population can afford to hire other people to perform services for them. The miracle of industrialization was figuring out how to make physical goods with extreme efficiency. Part of that was by reducing the amount of materials used. But mostly it was about reducing the amount of labor that went into manufacturing an object. Henry Ford's autobiography is a revelation on this topic. But ride-sharing is fundamentally about utilizing 100% of another human being's time to take you from one place to another. That can work in several situations: 1) you're in the top several percent of earners, or 2) you only utilize it for occasional trips. But those situations don't come close to covering the vast majority of transportation that takes place.
Hence everyone pinning ride-sharing's hope on self driving cars. But, uh, then you're just an auto rental company. Last I checked, those were not great businesses. And they certainly don't enjoy network effects that can take hold when you control a two-sided market, which is what's driving the current ride-sharing marketshare death march. So it's this weird thing where the opportunity sucks until self driving cars are a reality, but then the opportunity transforms into a car rental company, where you're basically deploying and maintaining equipment in order to chase single digit margins.
Anyway, I'll end my rant there. As you can see, I'm not a fan of ride-sharing business models.