Dianora (Diane Bruce)The "Marketplace of Ideas" (Burke) only works well when everyone has equal access to this market. In the old days this was newspaper, nowadays corporations have bought all the media and as Lippmann (Walter) pointed out 100 years ago or so those who place the ads get control of the content. Those that own the media control the propaganda.
This is why such things as the Fediverse are so dangerous for some...