If you want to be the centre of the world, if you want to be a public utility, if you want to be the front page of the internet... then you have to have a proper complaints procedure, a proper independent appeals process. Yes it would be very expensive, tough luck.
That is, anyone can pick who gets to censor / curate their stream. And Facebook just provides the platform. Maybe, for legally required censorship, the platform can still take action. But for anything else, let people pick their censor.
Then Facebook quickly becomes a platform of super-bubbles, and their influence on humanity becomes 100X worse over night. Content management policies exist because sometimes the creators of these platforms don't like them being used for evil.
