If anything TV and radio presented a larger shared reality, even if it was one filled with falsehoods. What is culture but a shared set of values?
What we are growing now is a system that can give each and every one of us our own reality, and if it succeeds, what of society?
I don't say this to mean, "oh, and they were wrong because everything turned out OK" If anything, we have had generations that grew up with this dysfunction in a normalized way, and it took another advanced in tech to really see it again.
(To take it further back into history, I think I now get what Cervantes was trying to say with the image of Don Quxiote tilting at windmills. It seemed so absurd, amusing, and quaint when I read it as a teen).