According to the paper you linked, right around 20% of people in IT, materials engineers, and even people in the natural sciences have an IQ in the 80s or lower

According to the paper you linked, right around 20% of people in IT, materials engineers, and even people in the natural sciences have an IQ in the 80s or lower. (under 90). Wouldn't you believe that, that's only slightly less than the general population which is at 25%, or right around what I predicted above :) The median IQ difference between college professors and service workers is not even a full standard deviation. Beyond that, I said average IQ100 programmer, of which there are many that can do a perfectly serviceable job in many sectors. Individual differences in cognitive ability are great, yes, but they are not even close to being perfectly represented in IQ. I don't know many Trump voters or young earth creationists because of where I live, but I know quite a bit of their relative equivalent where I am right now. Yes, there are a lot of differences, but I know enough young-earth-creationist and far-right engineers/stem people to know that it's not that simple. Anyways, I think I made my point clear, IQ is not a very good predictor of job performance, you can definitely be a programmer with IQ85, and a great many are.