What's the alternative supposed to be? Another CEO that has the absolute right to decide what goes on Facebook?

I think Zuckerberg is in an impossible decision. I think the fundamental problem is that social support for a classic understanding of the 1st amendment has fallen apart, but the legal requirements of the 1st amendment haven't changed (and personally, I don't think they should). Regardless, Zuckerberg is being forced to essentially create an extra-legal institution so that he isn't personally responsible for content moderation decisions. And he shouldn't be - no single person should have the power to decide what is fair online.