I'm not sure what that you are responding to. In the context of this article, I meant only that some huge chunk of the population will likely never experience increased wealth, happiness, etc. by reading deeply into LW or other intensive rationality training because they don't have big IQs. Simple heuristics and common biases are useful to know... beyond that, I see limited value.

For example, there is a rational way to dunk a basketball -- avoiding wasting effort & optimizing to a successful outcome -- but it isn't particularily useful to 99.X% of the population.