I think this is a bit of a mischaracterization of both the science and what I was saying. Genetic intelligence is not a min/maxed limit that we all have to work hard to reach. It is something that is fairly static and innate. It can be disrupted by trauma/nutrition but obviously for the vast majority of people that is absolutely not the case. We are born with, and live up to, our genetic intelligence. Very few of us in the first world were undernourished or subjected to extreme trauma at childhood.