In fairness, this is how the world has always been.
In the US for instance, back when there were only 3 networks and a channel for public tv, people were "reactionary, with only a superficial understanding of issues".
"He repeatedly states that the eighteenth century, the "Age of Reason", was the pinnacle for rational argument. Only in the printed word, he states, could complicated truths be rationally conveyed. Postman gives a striking example: many of the first fifteen U.S. presidents could probably have walked down the street without being recognized by the average citizen, yet all these men would have been quickly known by their written words. However, the reverse is true today. The names of presidents or even famous preachers, lawyers, and scientists call up visual images, typically television images, but few, if any, of their words come to mind. The few that do almost exclusively consist of carefully chosen soundbites. Postman mentions Ronald Reagan, and comments upon Reagan's abilities as an entertainer."
It's very easy to realize you're "different" from other people, but can't place your finger on it, yet manage to make up for the differences in odd and creative ways!
https://www.huffpost.com/entry/trump-seen-wearing-glasses_n_...
TV was also required to air a minimal amount of educational television for children under 16 during the day. I learn way more on days home sick (latchkey kid) than I'd learn at days in school.
Shouting "SO AND SO MAYBE MIGHT HAVE POSSIBLY DID THIS BAD THING BUT I DON'T HAVE ANY EVIDENCE!" from the rooftops won't provoke much action as shouting the same but reinforcing that it is definitely true, for sure, of course it is.
Then with human behaviour/intelligence there's the spectrum of people who care about fact-finding or not and will react according to new information depending on this. Some of it is general laziness, they can't be bothered fact finding, and some of it is tribal, they accept x must be true because it's about y tribe where they're a member of z tribe.
That's why it's so easy for politics, big tech, etc to manipulate people; because we're all still monkeys!