The basic human existence consists of food production and reproduction. No one has time for science or literacy.
People who focus on skills that don’t directly contribute to their own breeding success are a social luxury.
Humans have a very limited number of cubic centimeters in their heads. A woman’s birth canal can only be so wide and allow for efficient upright movement. We have only to observe how difficult childbirth is for our species to see that we’re already pushing that limit.
With limited real estate to build on, a person who’s especially good at one thing must sacrifice in other ways. It’s all too common for a great scientist to be socially awkward, because of the temperament required to excel and the time spent away from others pursuing his craft.
So a society that would have scientists must make cultural and biological provisions to allow a scientific breed of human to develop and persist.
Pretty much every culture today that produces lots of good scientists is at least traditionally a highly competitive culture of arranged marriages.
With the first priority of marriage to secure resources to support children, having sought after abilities became more important than having a natural instinct for dance.
In a free sexual market, the scientist who fails to devote all his resources to reproductive and social competition and who has the wrong temperament is crushed out of existence.
Without exception, instinct dominated societies have no science and most certainly no scientists. The arrangement of evolutionary pressures ensures no such thing comes to pass. Truth itself has no meaning if it does not further your aims. It does not matter for your purposes if the sun is some mythical god or a gaseous celestial body. It does not affect the outcome of your own struggles in the grand scheme of nature and you haven’t the luxury to waste energy worrying about it anyway.
So if a technologically advanced society allows a sexual free market, we can predict it will swiftly, within a few generations, revert to the ancestral equilibrium that allows no place for specialists who fail to maximize their immediate individual payoff within the story of their species.
Ability for science, highly skilled arts, advanced craftsmanship, curiosity, self-reflection become handicaps to a human animal that must first be concerned with food production and reproduction.