Indeed, it makes sense to be interested in nutrition. What's funny is that most people commenting here on HN are out of their depths and talk about nutrition, supplements, bizarre shakes, fad diets, keto, calorie restriction or whatnot with the same pseudoscientific beliefs as other non-HN people discuss astrology ("but it really works!"). They "don't know that they don't know" and believe the most bizarre things. That's very relevant to the article and also to the OP's comment at the top of this subthread :)

PS: lest I sound too arrogant, nutrition is not my particular blind spot (I'm aware I don't know much about it), but I'm sure I have other blind spots I'm not aware of!