That is a very good question, but I think we differ on the answer. The moral of the article doesn't seem like he should have cared more about marketing, usability, business relationships or all the other cruft involved in forming a business, but that his idea, sadly, didn't have traction. So really it was more likely the product. If the minimum viable product is built and doesn't have traction it is entirely possible the idea may not have enough traction.