Your observations about Americans I think are valid however that is only a subjective view. The guy on Varitisium he did some averaging of several IQ determining methods and from this refining of that data the dark matter, as it were, was revealed. It does make you wonder however when the Internet makes it possible (in fact the social media algorithms help them) for the supersitious to clump together. American's brand of capitalism would seem to encourage an empty mind to begin with. Everything in a collective sense is discouraged excepting who you vote for and what church you attend. Otherwise, they are a blank slate for marketing strategies. Americans understand this in the sense they will go out to discover what to buy, not what they need. It is not a sustainable way to run a country in my view. If there are 30 million dumbells out there then they are going to bollocks things up when it comes to solving the importnat issues. AI may compound this too by turning several hundred million into useless members of society. That can't be good. I might be one them. Time will be the revelator I suppose.

The guy that has the YouTube channel Veritesium calculates that 30 million Americans have an IQ of 80 or less. I see no reason to suspect he is wrong. That's not a comfort.