I think we all know exactly why. The 20th Century was an amazing century because basically the peasant class became educated. In my grandmother’s time they had child labor. High School graduation was a distinction. Then it was routine. College became routine. Grad school widespread.
Peasants graduated to a " middle class," existence. Never before in human history( geological).
To me that’s the context of what you describe. Alternate Facts are easily sold today. The methods of dumbing down are arguably more effective today than with the uneducated generations preceding us.
It’s relentless. And " fake news" whether you love the campaign or hate it, is participation at the highest level.
In a pandemic, we are exponentially more vulnerable. All of us. People irrationally stampede just like animals do.