It's not your intent I realize, but doesn't this rendering of the importance of the other players, inevitably give short shrift to the very noteworthy role, culturally if not as actors, that the inclusion of Nichols and Takei in the cast meant at that time in TV history, as well as forwarding the narrative of the TOS era being enlightened in its unquestioned acceptance of diversity, at least as regards Terrans??
No, and I think you're missing the point: for a series structured around the lead ------ supporting player format, the diversity was in having the racial minorities there at all. Further, racial miorities were not the only supporting players to not be seen as important or enjoyed development as the Big Three, if you look at seemingly "major" characters (fan perception) such as Scott or Chekov. So, one can say TOS was being diverse, but you cannot ignore that the minority characters--as well as a white character like Scott--were not seen or developed on a matching level with the Big Three.
There's nothing incorrect or sinister about that.
Let's just take African American actors / characters for this example; in the case of other 1960s TV series where the minority characters happened to be intended leads from the start, you see a different treatment:
- I Spy - Alexander Scott
- Julia - Julia Baker
- Mission: Impossible - Barney Collier
- Mannix - Peggy Fair
- N.Y.P.D. (the 1st series using that title) - Jeff Ward
- Ironside - Mark Sanger
- Land of the Giants - Dan Erickson
- The Mod Squad - Linc Hayes
The characters listed above were--like their white counterparts--
intended to be larger, main characters, so there's no misconception about their
real importance to their respective series. They did not need revisionist fan or journalist screeds to turn the series into an even playing field "statement."
The problem is that TOS being set in the
23rd century framed itself as being a
forward thinking vision of tomorrow--and it was, but at the end of the day, it was a TV series using the aforementioned lead ---- supporting player format, so even if Sulu and Uhura were white, there's no historical evidence concluding they would have been treated or developed in a more significant way (
hence the reason Doohan and Koenig also complained about their imagined status).