The point here is that our news is now heavily curated through Facebook. And Facebook determines what we view based on an algorithm essentially designed to maximise time on site & retention. That is, Facebook figures out what to show us to have us staying longer and coming back to Facebook. (Some good recent data on the firm’s dominance as a news platform
That may not be educational, informative or diverse, even if you deliberately try to add diverse sources. Why? Because your own internal bias will reward the maths one way or another. And that slight bias will be seized on and amplified.
Part of the issue - Silicon Valley’s twin heritages of libertarianism & hippiedom. Layer on a solution-oriented engineering culture that by and large has not studied nearly enough philosophy, political theory or history and you can understand why these platforms take the stance they take.