Feels dangerously close to assuming this means some are built to be engineers while others are simply built to be the cogs that make our machines turn.

@Sean Black well it stated there will always be stupid people because it serves a purpose. Seems to imply it may be a facet in why our society continually takes a hierarchical approach to every detail of living. While id hate to disagree we're all just one decision or indecision away from stupid ourselves there is a sect of the population that even when you life the veil a tad and get them to think beyond their usual scope they cannot grasp it in their own understanding and either require you to be present to help them think critically such as the story with mimir being the consort to the imposed king of the vanir after the aesir vanir war. He was a knowledgeable king when mimir was around but indecisive and bumbling when mimir was absent. They instinctively return to "stupid". As with the story and the overall theme of the video it seems to imply no matter what a portion of the population will remain stupid, followers to benefit those who are exceptional. Otherwise NPC's in life.