That might be it. Inclusion of black characters into a the crew of main characters in a mainstream series wasn't really a thing until I think the 80s. And even then the character's blackness would barely be shown. Media for different groups were heavily separated by race well into the 90s. But the 90s graduated to including "black characters who danced, listen to black music, and played sports". Major discussion about real inclusion wasn't into recent times.
Even now there are few African, Black American, Caribbean, and Afrolatino elements in most RPGs. And now due to racial sensitivity issues in RPGs, I don't know were it will go. But I think video games are far ahead of TTRPGs on this one.