Homer is obviously white in terms of culture

You understand that race and skin color are not the same thing, which makes the rest of your argument confusing. If we are to understand that yellow is just a proxy for white, then making it the standard and default is preserving the essence of whiteness while flatting and erasing everything else.

Race isn't real. Neither are religion, human rights, boarders, sovereignty, language, the law, and money. Just because something isn't real doesn't make it powerless or irrelevant. Only people with yellow privilege get to ignore race.