I am about the same age as the author of this piece. I think they are making a fundamental error with his comparison.
"Back in the day", radio stations, newspapers and television networks were the only actual public media (we could include zines perhaps, but they rarely had the printing capacity to reach a large audience). Their status was conferred by their capital requirements, legal status and in some cases, physical properties.
Today's internet gatekeepers only have the role they do because of network effects, and because people implicitly grant them that role. None of them have licenses from any government to do what they do (business license, sure; not a license to serve specific kinds of content the way that TV stations do).
The only thing preventing my voice from being heard more widely is that most people are watching/listening/reading in places I don't have the desire or capacity to conquer. But there are no hypothetical barriers to me becoming a wildly adored prophet, I just have to do the work.
I think it is both dangerous and misleading to make this comparison, but more significantly, it is also misdirecting. It leads us away from what we would need to do if we actually want to build alternatives, and instead draws comparison with utterly different media and legal frameworks.