You're combining two separate issues. Whether taxis of any kind should be allowed to drive in bus lanes is one issue. (Whether there should be bus lanes at all is another!)

Quite separate is the question of taxis picking up and setting down in bus lanes. I leave you to dictate to the elderly, the sick, the physically disabled and the blind that they are not allowed to be set down or picked up from outside their building and that regardless of the severity of their problems and regardless of the distance involved they must move themselves to a location where there is no bus lane.