It's simple.
Right wingers are busy producing.
Left wingers are busy whinging (including in media).
Gratuitously dismissing a rebuttal as “word salad” seeks to undermine the author rather than engage with the argument.
Anyway, the legacy of the Fairness Doctrine is often misunderstood. As you know, it required broadcasters to present contrasting viewpoints on controversial issues. Its repeal in 1987 removed a regulatory barrier to opinion-driven broadcasting and helped create conditions ripe for the phenomenal ascent of American conservative media since then: e.g. Rush Limbaugh became nationally syndicated in 1988, while Fox News transformed the television news landscape after its launch in 1996.
I respect the point you are making (and understand why you are making it). But if anything, the post-Fairness Doctrine era is the story of the remarkable rise of right-wing opinion outlets and an increasingly polarized news ecosystem, not proof of an idée fixe that U.S. broadcast media remains overwhelmingly left-wing.
(And this is before the online environment is even considered in the conversation).
Reasonable people with differing viewpoints can agree to disagree on this topic, so perhaps that’s where we might leave things here.