And "contrasting viewpoints" mean little when they're sheer lunacy.
The example that screams out to me reading this cmoment is Reddit and it's ability to sort comments and threads by "controversial".
What I am against is machines feeding you more of what you just looked at. That's dangerous. It's too easy to end up VERY deep down dangerous rabbit holes. You should have to use critical thinking to explore your interests, not just get fed whatever will drive engagement.
This brings my morning routine to mind, which I explicitly designed to combat this feed poisoning that everyone is enduring. I literally hit the wikipedia random button every morning before I get out of bed. It's hooked into my morning alarm. I don't check feeds in the morning because I want to let my mind explore without someone influencing my focus, which helps me be more creative later in the day.