Am I crazy, or does the subject of this post miss the point completely?

Wasn't the whole point of this article the fact that the writer WASN'T an engineer, but that he intimately learned the product he was marketing, and that was what people wanted?

I think the point here is that the good marketers are the people who can crossover from one part of the office to the next. An engineer with no social skills will do no better than a marketer with no technical knowledge-- you need both. This article happened to be about a marketer who crossed over, not the other way around.