How did we arrive to this point where a huge chunk of the population is in one reality and another huge chunk of the population is in another reality? Segregation of information sources? Politicization of media outlets? Self-reinforcing social bubbles? A combination of all of them and more?
All the social media sites did the research and learned that filter bubbles and outrage drives engagement more than anything else. If you tune your systems to maximize engagement and ignore the side effects, the side effects still happen, whether it’s deliberate or not
Everyone’s Youtube subscriptions are an echo chamber of views they mostly agree with because people only click subscribe on such channels.
A recommendation engine working perfectly is going to show you lateral channels that might be more or less extreme of the last one. But that’s not the root of the problem.