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Despite all its flaws, reddit got this mostly right. Having explicit sub-communities allows groups of people to keep to themselves if they want to and ban anyone who's not welcome.
No, OP is being transphobic and referring to trans women as men:
> Note that the "banning controversy" is that they're not banning enough people for having entirely mainstream political opinions, and mostly targets journalists. Or let's be more specific: mostly targets people who don't think that men can identify into being victims of misogyny.