TBH that absolutist position feels untenable. Unmoderated platforms are quickly overrun by objectionable content, and easily usurped by moderated competitors. The only way to force this would be through legislation, and I just think there is no way that the majority of people can be convinced to support/vote for that position.
That's true of communities involving large groups of people; this is Facebook Messenger, which is mostly used for one-on-one or small-group chat, like SMS. SMS is not generally overrun with objectionable content, even though it is mostly unmoderated.
