Don’t jump to “selected for” when “culturally rewarded and practiced” is likely sufficient. The author is WAY too quick to reject the idea that PPEF executives could become this good at it just by believing that it’s important. To me, this seems like something one could excel at with only a few weeks of practice and intent (note: I have no personal evidence of this, as I myself have not done so).
Separately “in software” is a ludicrously large category, with such a wide variety of cultural expectations as to be meaningless. There are places where appearance and poise matters a lot, and places where it might not be noticed on the third or fourth day you wore the same food-stained t-shirt.