Luke was working from the perspective of a man trying to improve his social skills in order to be contributing more equally to a potential relationship. The implication was not that women do not also need social skills, rather, for him to attract the attention of a woman (who has already caught his attention, presumably, with her social skills, body language, pheromones etc.,) he must have better social skills.
From personal experience, I feel that most of the pronouns in that paragraph could easily be reversed. There are women with poor body language and poor social skills; if anything, this essay proves that, because he’s not thinking about how to attract those women.
The fic often takes ‘joke’ aspects of magic and explores their less harmless uses. It leads the reader to be unwilling to take any reference as simply a joke—this as opposed to the original text, where the fact that it was meant to be a children’s book led to a lot of bite-sized humorous references with enormous, unexplored potential.