Not only does this idea sound ridiculous (extroverts can't listen? WTF?), it sounds like the author is missing the point of the big difference between extrovert

Not only does this idea sound ridiculous (extroverts can't listen? WTF?), it sounds like the author is missing the point of the big difference between extroverts and introverts: how much they enjoy being around and meeting new people. To introverts, this is tiring, whereas to extroverts it's enjoyable and refreshing. Sales is naturally a job for extroverts because of this factor. As an aside, this makes me wonder: what jobs are a good fit for introverts, aside from maybe 3rd-shift security? Software development, for instance, is most definitely a job for extroverts. Introverts would never be happy with all the noise, talking, commotion, and lack of privacy involved in a modern software development job in an open-plan office.