When it comes to mass media, they can choose the channel that they listen to from a limited number of platforms. On this channel, they hear something because a few elites made a decision to broadcast it. For example, how many Messengers are there? Apple, FOX, Telegram have a responsibility because of their reach.
Anyway you haven't addressed the downsides I posted. All you do is ignore them in favor of the upsides. I could be an anarcho capitalist and insist on the unlimited right to property, also. Saying it's a moral right and ignoring any downsides.
Roughly 3/4 of Americans have access to the internet[1] (and more than half of them are over 65) as of two years ago, which blows the "limited number of platforms" argument away quite handily. The number of individual outlets you can get your news from is functionally unlimited.
The mass media has a responsibility all right, but not the one you think they do.
Functionally unlimited, not mathematically infinite. No human has the time to meaningfully evaluate all of them.
And I think their responsibility is the conditions under which they were given broadcast licenses in the first place. Something about serving the public good.
Anyway you haven't addressed the downsides I posted. All you do is ignore them in favor of the upsides. I could be an anarcho capitalist and insist on the unlimited right to property, also. Saying it's a moral right and ignoring any downsides.