Take for instance Ruqqus, another site created as a free speech reddit alternative. It consistently has horrifying content on the front page regularly; viciously racist content, anti-Semitic memes, unironic pro-Nazism/pro-genocide discussion posts, and generally terrible content. This is likely because it is exactly this content that is being "censored" from Reddit, not these harmless free speech advocates who are silenced by a big company.
Can anyone actually tell me what valuable discussion is being censored on Twitter, Reddit, etc? Banning this type of content is mandatory if you want a platform that is safe and available for trans people, Jews, gay people, women, etc.
People shouldn't have to tolerate people @ing them with slurs, be exposed to "reasoned" arguments for their extermination, or memes dehumanizing them for the sake of "free speech."