[PKop]

Taking the US as an example, I think the concern is that there is 1 Facebook, vs 50+ state / regional news papers to get competing viewpoints. Yes, many of the sources of news on Facebook are themselves different news websites.

The point here is that this is all being funneled through one filter. And many media / news companies may disappear over time so the issue could become worse.

Number and variety of sources of information is the distinction.

I think your analogy would apply if there were many "Facebooks". But there is only one.