Why is stupidity so successful?

Listen to what Ennio Flaiano wrote in 1969 in Il Corriere della Sera about stupidity:

Stupidity has made enormous progress.
It is a Sun that cannot be watched fixedly.

Thanks to the media, it is not even the same anymore,
it feeds on other myths, it sells itself a lot, it has made fun of common sense,
and it spreads terror around itself.

What would he say today, in the age of the Internet?