I don’t share any of the pessimism. If you are at least tiny bit curious about looking beyond your IT bubble you know that the majority of population has always been dumb. It’s just biological fact of life. For better or worse hundreds years ago they didn’t get any power. Today they got internet, got exposure and got power. Nothing is changing on a fundamental human nature or statistical level.
You can look at skeletons of prehistoric man and see bone healing which can only have occurred if the group decided to look after someone who couldn't work at that point. Humans are inherently stupid and selfish, but they're also inherently clever and cooperative; it's all so dependent on material and cultural context. It's true in my view that the general culture of late capitalism makes people inclined towards stupid and selfish ideas, but the idea this could actually do serious long-term damage to humanity's actual nature until everyone is a bumbling moron is absurd. Not just absurd either, but fundamentally insulting to all of us in my view.
Culture is often a product of material conditions, if Idiocracy's premise that it's possible to make humanity dumber on a lasting basis had the slightest merit then it would have happened already a hundred times over. Not least from the amount of lead we were pouring into the environment from the 1930s onwards! In reality if humanity did get dumber for cultural reasons, the material conditions associated with that culture would soon collapse and there'd be a new selection pressure to avoid the same kind of stupidity.