Posting violent, hateful, evil stuff is as old as the internet itself. There will always need to be moderators. The question is how these people are treated.
Do you really think it is _impossible_ for a company as big and valuable as FB to treat these moderators well? Do they not have the money to pay them what they deserve, to give them sick leave, and to offer even basic mental health services?
Imagine if half or even a quarter the money and effort that has gone into their crypto debut had gone into helping build better tools and services for their moderation team.
I'd definitely believe that that is the case, as there's little economic incentive to play the long term game with its uncertain payout if you can just churn through low-wage content moderators instead.
Users of Facebook, but more realistically, employees of Facebook are the ones best situated to pressure Facebook to change that behavior.