Second, our society spends a lot of time shaping culture and people to extract value from them.

More than that, society spends an increasing amount of time and money trying to convince people that they should be mad at each other for arbitrary reasons. I don't think this has much to do with intelligence, though.

See recently: Andrew Cuomo's racist AI-generated mayoral ad & Trump's AI generated truth post where he shits on Americans. It's hard to have a general feeling of happiness when the people with money & power in this world feel the need to go out of their way to spread their disdain for me because of how I look, what I do for a living, or the fact that I wasn't born into wealth.