Gatekeepers aren't just public gatekeepers. Powerful private press outlets have controlled and filtered information for centuries. And obviously before that the relationship between rulers, church and printers was a complicated mess.
So yeah, there were already gatekeepers, which doesn't mean you couldn't get around them, especially when new media is introduced. Unsanctioned press was a thing, even before radio.
I do think it's refreshing to have someone online come at it from a European perspective, where gatekeepers are assumed to be controlled by the state. The US version of this conversation is so prevalent even not being American one forgets it's not the default.
Speaking of gatekeepers, I suppose.