Why aren't we working on drugs to make people smart?
I used to think like you do. But the real place where we could make tons of progress is in relationships. Many stories of great thinkers involve one or a few crucial mentoring/pedagogical relationships. Without those, a person could forever find themselves trying to fit their square peg into the round hole of what "normal" society around them seems to expect. I can easily see how my life could have ended up like that…
But then, if 'mentors' applies to parents, then I guess I'm saying the same thing.
Having said that, my teenage son wastes a lot of his life playing online games with his friends, but having said that, I heard him say mid-game to a friend of his "Brazilian isn't a language you idiot!". So, I mean it's trivia, but he knows there's no language called Brazilian. He's a smart kid (that's not the only data point).
(I had to look it up: Portugese is the official language of Brazil).