A Robert Sapolsky quote from the article I linked to in the previous post that I think relates to the topic of 'expert performance' that has been a frequent one on this blog:
"To some extent, the age-old “nature versus nurture” debate is silly. The action of genes is completely intertwined with the environment in which they function; in a sense, it is pointless to even discuss what gene X does, and we should consider instead only what gene X does in environment Y."