I agree (and have posted elsewhere in this discussion) that there's a problem that needs solving. Nonetheless, the Fairness Doctrine didn't do what the OP claim

I agree (and have posted elsewhere in this discussion) that there's a problem that needs solving. Nonetheless, the Fairness Doctrine didn't do what the OP claimed, and couldn't be made to do what the OP wanted, and yes, I think that does fatally undermine the argument being made. (Not to mention which, the current supreme court is much more protective of free speech than in previous decades, and particularly of free speech exercised via corporate forms. Realistically, the odds of an expanded Fairness Doctrine passing muster in this court are nil.) All of which means that whatever the solution ends up being, it's really not going to look much like the old Fairness Doctrine. Which, again, doesn't mean the problem doesn't exist!