I feel like Uber can always make money as a marketplace - but competitive pressures from other marketplaces will drive profits down. However, is there any further growth in the model? Seemingly no unless they gain monopoly.
You are making me smack my forehead to the point of giving myself a concussion. If your comment were true, market economies as a concept would be unviable. The global economy would not exist if your comment were true. Ride-sharing is a market. People compete in the market. That’s how literally every solvent business in the world operates.