Those types of programs aren't giving actionable legal advice. I can't comment on doctors or medical information because I am not one, but a lawyer showing up on a morning show talking about victims of drunk driving and telling folks not to drive drunk is not the same thing as a lawyer (or worse, a journalist that's done a bit of Googling) publishing the legal standards for an affirmative defense to homicide. A lawyer that informs the general public that "they may be entitled to compensation if they live near XYZ superfund site" or "they might be able to avoid their timeshare contract" is not giving actionable legal advice, and it's certainly not giving actionable advice that exposes the publisher of the lawyer's statements to a serious litigation risk.
WRAL isn't getting sued if someone relies on "drunk driving bad." A five-minute news segment on timeshares will not teach John Q. Public how to prosecute a complaint to avoid a contract.
This is why lawyers are no fun: WRAL's going to have a real problem if they publish an article explaining the objective standards for ability, opportunity, jeopardy, any requirement to retreat, castle doctrine, etc., and then somebody shoots someone else and claims WRAL told them it was fine. General counsel (or a smart editor) would never let that happen.