Yeah, that’s been the thinking at least since Lippmann’s time.
If you only vote on local issues, you don’t need media to inform you since you can see it first hand. But as soon as the average citizen is expected to keep up with state, national, intl politics you need a media capable of informing them.
That doesn't fit the role of media in this discussion. A crucial element is their (relative) independence. Parties to an issue that have full control over the distribution of their message is what the article is holding up as the _threat_ to traditional media (ie Elon Musk's "crier" is @elonmusk).