What are the food supplements that, to the best of our current medical knowledge, are actually healthy and everyone should consider taking?
This is the right answer. Of course marginalized groups tend to colonize new communities, because the big platforms, both because of their top-down structuring Nd because of the people who are on them, aren't always welcoming.
This is different from Voat tho. Voat was explicitly made to be a "free speech zone" i.e. a "let's say nazi shit because nobody can censor us"-space. The fediverse's idea is simply not to be dependent on centralised platforms, it says nothing about the content. If it happens to be left leaning, it's because left leaning people tend to care more about stuff like right to privacy and centralisation.
Preach it brother. Enlighten the unwashed (m)asses.