I guess is it was mandatory to gender-flip some characters in The Eternals, because, Title IX, or something (are we still supposed to believe Makkari was confused with the Greco-Roman Hermes/Mercury?) but what is the point of ethnic-flipping characters when those characters are already, or plausibly already, non-white? Kingo Sunen was a samurai and Japanese film star so why not go with a Japanese or east Asian actor? Gilgamesh could have been cast with an actor of middle eastern descent rather than one from Korea. But this is Hollywood so screw the source material.
For the record, I was fine with the Ancient One in Doctor Strange because, hey, Tilda Swinton.