'to give their customers the fastest etc.,'. Nice if it works that way but plenty of customers don't agree that that's what happens. And of course it is inarguably a monopoly.
As noted by one journalist
"If black cab drivers are as good as they think they are, then they’ll beat the new competition on a level playing-field. If they’re not as popular, they’ll have to bring down their high prices. Either answer leaves the consumer better off."