Black cabs are in their own category due to The Knowledge and the general vetting process, but if what you say is true, why don't we see Addison Lee, minicabs,

Black cabs are in their own category due to The Knowledge and the general vetting process, but if what you say is true, why don't we see Addison Lee, minicabs, Kapten, Bolt and Ola getting the same level of scrutiny? Do we have any reason to believe that any of those have implemented policies and procedures that make them more fit and proper?