As the world building in Star Trek developed with the idea of a multispecies Federation and the concept of Starfleet being responsible for its galactic defense made me realise how in universe the Federation is very Anglo - Humancentric. The official language is English, it seems that most of the 430 crew of the TOS Enterprise were white humans from North America, exploring space and supposedly representing a Federation of different species, all of the Admiralty were human males in TOS and even in the TOS movies, (even the HQ scene in STID has not one alien looking admiral in it), its not until DISC we some some diversity at the top of Starfleet. The Admiralty of TNG, VOY, DS9 is even more light, bright and damn near human, the so called flagship of the fleet (Picard's Enterprise D) has a crew that is 99% human and everyone of its heads of department as humans, until Worf gets promoted. No one on that ship has a commited relationship with a non human, 300 years after First Contact, its full of human couples. Maybe its known in the Federation that humans are racist, they will have sex with you but most don't want to socialise with you. Or maybe humans smell so bad they have to stick together! lol ENT is basically NASA in space, same for the Earth Starfleet admiralty, it represents a United Earth population as well as Paris, Texas represents Paris, France. Ok the real life T.V production reasons for TOS being the way it was is understandable, the other shows with bigger budgets had no such excuse. So yes racism/speciesm has been a part of the universe of the Federation from the beginning, including Landry's comment, its as bad as assuming all black people can sing and dance. Even the alien with the human wife practised it with his own son (yeah that's you Sarek!) The human privilege in the Federation universe is just a tiny reflection of the real life white privilege of life.