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Plus let's face it, radio hosts say goofy crap for ratings and social media folks say goofy crap for hits/likes/links. They're all looking for their niche.When grandma says "back in the day this is how we treated the flu" it is most likely because that is how they treated the flu, but we know better now.
And radio is indeed a medium, although not a form of social media, as the masses don't have ready access to two-way communication through radio.
Still, radio isn't sentient either, and when it comes specifically to covid-19, the lines are very well drawn and very obvious; so are the sources.