I think that's a fair counterpoint, but I'm not sure it covers the whole charge. What Facebook does is both to limit the diversity of opinion to which a single

I think that's a fair counterpoint, but I'm not sure it covers the whole charge. What Facebook does is both to limit the diversity of opinion to which a single user is exposed, as well as extend the reach of particular points of view (those on the more extreme end, which are more "performative"). That creates validation of points of view that can be expressed harmfully, and creates a gathering cloud of cultural force that would likely not exist without it's influence.