Dude. What part of "in this fantasy world black people just don't exist because that's my personal fantasy vision" is NOT fucking racist?

Don't get me wrong. I don't think there's anything wrong with a story set in a place where there happen to only be white people. In an isolated village or whatever that makes perfect sense. But there's a difference between "in this setting, these characters have no reason to come into contact with people from other ethnic backgrounds that aren't what we would see as white" and "actually only white people exist in this world because white is the default normal for humanity"