Here’s what I’m getting from all this…
If we look at dwarves, for example, Blizzard was originally inspired by Scottish culture, hence why they have only been white until now. Their appearance reflected that culture. Humans were inspired by Americans/Europeans, hence why they’ve had some more diverse customization compared to other humanoids. Elves were originally inspired by Tolkien elves, who are blonde w/fair skin. The cultures that are not white have typically been made into races like pandaren or trolls. That’s how it’s BEEN.
What I’m getting at is CURRENT WoW has removed race inspiration to give people more options. Does it make all that much sense? No, not really. But that’s not a goal of theirs anymore.