I think you missed my point: printing at scale needs a support system and a distribution system, and that requires capital. The "age of mass, top-down communications" didn't start "in the mid 20th century", and the printing press should not be used as a counterexample to support rayiner's argument. William Randolph Hearst was born in 1863.
The point is you are letting a system designed by elites to uphold elites set the boundaries. There are many forms of alternative media out there, some more popular than any billionaire owned rag.
Just expand your definition and don't let others tell you what is or isn't appropriate. Especially when it comes to political thought.
Add in the red scare + knee capping more leftists + academics during the 60s, 70s and you have a once massively influential independent confederate type of worker lead organizations that now amount to some moderate pundit's substack where they traded advocacy for ad dollars.
But before all this there were dual power institutions and mutual aid even going as far as providing free public education to all (who do you think taught cattle ranchers how to read in the 1880s? Then look at how quickly they took up leftist literature then writing their own).
What are you truly saying here because it just sounds like you don't know the history of labor in the US, which no shit. They don't teach this stuff anywhere, you have to purposely seek it out because neoliberals consider this type of stuff heretical.
It's why I hate people looking down on fanfiction, too. Aliens was Alien fanfiction. The New Testament is OT fanfiction. Hell, nolan's The Odyssey is fanfiction.
The establishment uses terms to dismiss outsider art as less-than, and this isn't much different. (They of course get to decide what the "inside" is)
Just because an established Hollywood director was a fan of the first Alien movie does make his script for Alien's sequel "fan fiction".
Cameron had already written and directed The Terminator when the owners of the Alien franchise chose his script for the sequel.
(Fifty Shades of Grey in contrast really did originate as fan fiction.)