Well, replies to a post also require moderation. In general, if you want people to ever see something created by people outside of their explicitly chosen friends: moderation.
(Plenty of people don't want that, or would at least prefer interacting only with their explicitly chosen friends if they were forced to choose between that and unmoderated public access. For them, group chats on Signal/WhatsApp/Telegram suffice.)
(Plenty of people don't want that, or would at least prefer interacting only with their explicitly chosen friends if they were forced to choose between that and unmoderated public access. For them, group chats on Signal/WhatsApp/Telegram suffice.)