It's not really a gross thing, it's actually fairly common that a lot of minorities choose to be taxi drivers because it's a job and oftentimes is a business that they can start for fairly inexpensive and unlike most white people they're willing to work the long hours that it takes to actually make it work. I've known several guys that were taxi drivers and almost every single one of them were of various races not white. Nothing wrong with understanding the oftentimes people choose those jobs because of the circumstances surrounding the way society is.