I don’t think social media really is crowd wisdom at all. It is built to pander to our worst impulses (I think, knowingly and openly, right? The algorithm selects for engagement, not learning and growing), and I’d be surprised if it isn’t producing a feedback loop as well (perhaps as an unintentional side effect). The wisdom of the crowds hypothesis relies on a random sampling, we’re intentionally applying a skew toward the angry and shallow.