You might not get to pick the cab driver themselves, but you can pick the cab company you are willing to patronize (even more so where there is increased compet

You might not get to pick the cab driver themselves, but you can pick the cab company you are willing to patronize (even more so where there is increased competition). If I have a terrible experience with Company X, I probably won't use them again unless they give me a good reason to change my mind. This is a powerful incentive for companies to ensure their drivers are providing a quality service (or at least it is in a competitive market).