Is this really different than TV news? Most people stick to one network (Fox news, NBC, CNN, etc) and not only do they not watch the others but believe they are corrupt, fixed, and lying.
The problem is we don't have multiple major news organizations per major area like we used to. Back then there was bias, but it was easier to be called out on it. Now I think many people are fine living in the bubble.
It's different because Facebook has captured nearly every American adult and they have a Google-like (in search) dominance over social. There's no news platform in US history that has ever come even remotely close to being able to claim that. They're just about worth more than every US media company combined, their reach and financial power are already incredible; four years from now they'll be as profitable as Google is today and their reach will likely have expanded further.
I can't see a scenario where Facebook manages to avoid anti-trust action against it in the next four to six years, both in Europe and the US.
The problem is we don't have multiple major news organizations per major area like we used to. Back then there was bias, but it was easier to be called out on it. Now I think many people are fine living in the bubble.