It would behoove you to suggest a practical alternative, instead of just condemning their existence.
Like others on this thread, I talk to my drivers and ask how they like Uber, and, once I started doing that, also started asking cab drivers. Cab drivers for licensed companies are not happy.
Food delivery startups are huge right now, I get like 4 ads a day for different ones in Seattle. If anything, Uber is late to this game.