Well, I was going to post this as a comment, but some people can't take the goddamn heat when they create offensive things, so critics get kicked out of the kitchen. Or the atelier. Shitty metaphor, moving on.
Fantasy universes aren't created in a vacuum. Worldbuilding of fantasy settings reflects the author's own world, and consequently their own views, biases, and prejudices. You can't slap a "fantasy" label on, for example, a character portrayed in a racist way, and get a free pass for your racist portrayal because "it's just a fantasy world." It's still offensive, and it still perpetuates harmful stereotypes in the real world.