Because claiming "a decentralized ride solicitation tool with a reputation system, maybe blockchain-based, could kill off Uber and Lyft almost overnight" shows

Because claiming "a decentralized ride solicitation tool with a reputation system, maybe blockchain-based, could kill off Uber and Lyft almost overnight" shows you don't know what you're talking about. You don't know what Uber does or the value it adds in keeping the critical mass of drivers and customers necessary to have a functional and high performing marketplace.