I think the point is that, if I as an activist am aiming to maximize the number of content moderators treated well, the highest leverage way to push for that is

I think the point is that, if I as an activist am aiming to maximize the number of content moderators treated well, the highest leverage way to push for that is getting people mad at Facebook. There may be a preexisting system of unpaid content moderators who are supported even less, but that's much harder for anyone to address.