Others have brought up the inherent tension in the idea, but there are some potential avenues that try to avoid the pitfalls of the issue. For example, distributed moderation, where you subscribe to other users’ moderation actions, allows anyone to post something while also allowing anyone to ignore them based on the moderation actions of those that they trust. If you combine this with global moderation of outright illegal content and mandatory tagging of NSFW/NSFL posts, which are generally considered to be necessary or at least understandable restrictions, then you have a somewhat workable system. You could argue that a platform that allows community moderators to curate their own communities also allows free speech and blocks hate speech, but that only works if the mods are always fair, which… yeah, no lol