Oscar Wilde noted in an aphorism that is appropriate for Idiocracy, "The good ended happily, and the bad unhappily. That is what fiction means." In real life, as you note, people are not only ignorant and stupid but also corrupt, cynical, venal, short-sighted beyond belief, and incapable of altering their ignorant opinions in the face of overwhelming evidence to the contrary. It seems implausible to imagine much of our present technological civilization will still exist 500 years hence and far more plausible to imagine us pulling the whole thing down on top of our heads in a glorious display of everything that's wrong with humanity.