[PragmaticPulp]

Reading between the lines, it looks like these people are employees of contracting agencies to which the content moderation has been outsourced.

If I had to guess, I suspect that the motivation to bring people back to the office comes from content security issues. Not all content flagged for moderators is actually objectionable due to errant or malicious flagging. It's impossible to guarantee that private material will stay secure when it leaves the premises.

I'm on the side of the content moderators here (should be allowed to work from home) but it's not difficult to imagine the headlines criticizing Facebook for allowing private content to be viewed, and potentially shared, by content unsupervised content moderators working at home.