And this assumption, I think, is one of the crucial cultural barriers that needs to be overcome IF we want mastodon to be a "home" for folks who are not in the power majority.
Now, I am aware of the design history of Mastodon, that queer folks had a hand in the development of the protocol. As a black queer man, I can tell you first hand that queerness is no bulwark against the inheritance and reproduction of whiteness. Which is to say that this history is no argument against the present.