Like how newspapers and other media can use editorial discretion to create the impression that “all reasonable people” hold some opinion X by only publishing the voices of reasonable people who believe X (manufactured consent), social media platforms can do the same thing, but x1000 thanks to automation and personalization (“the algorithm”)

If the editors are independent, and part of the same public discourse as their readers and authors, then you wind up with a diverse media ecosystem where the liberal machinery of people working out complex issues through public discourse can hopefully still more or less proceed. If one part of the ecosystem isn’t letting outside voices in, the feedback mechanisms are broken and you don’t have a healthy public discourse anymore.