This is quite a piece of idolotry. Let us start at the end first.
For many jobs no one requires a certified plumber or electrician or anything. There is no requirement to get such a certification. For certain jobs it is a requirement to get a permit, but that is to protect lives. OTOH I am sure you would no problem if your family died because the water heater exploded or the house caught on fire because of the work of a plumber or electrician was faulty, because, after all, she had good recommendations from people who had no expertise in critiquing the actual work. In any case, such requirements as the exists, are demanded not by government but by bankers, insurance companies, and general sane people who do not want to die because the invisible hand, or magic ratings, or whatever, was a substitute for competence.
It is intersting that th.s hair brained scheme was introduced after the previous hair brained scheme, to force some Uber drivers to work at or below cost, failed. You see some of the driver took the capitalistic idea of better service leading to more profits seriously,So they only wanted to serve the high end clientele, and invested resources to do so. But Uber told them they could not limit themselves to high end customers, and said if the drivers did not pick up any customer that Uber sent, they would be out of the network. This was absolutely Uber's right to do, after all the contractors could just leave, but I think it speaks to an issue with capitalistic fantasy. At some point the people who are taking a cut of everything the workers do, will want an increasingly large cut to support their increasingly inefficient operations, and to do that they will begin to compete on price instead of service. The contractors, as individuals, can make that choice on a case by case basis. Corporate, however, seeing only a lack of funding for their cocaine habit, are only able to make drastic decisions to increase funding for said habit.
In any case, the Uber drivers still had the ability to strike, so they did, and Uber relented.