I think the article severely downplays the importance of attractiveness. If the other party finds you attractive, the bar is lowered to the point of you simply being normal/average in terms of intelligence, wit, and whatever else you want to include in your definition of what makes a person "interesting". You basically need to be a vapid idiot to give anyone a bad impression as an attractive person. It's a huge facto…
For example, it took me a lot of years to realize why men where constantly bragging about their lives when I first met them. Initially I thought that this is common, that everyone does it. But it turns out that they do it because I'm good looking and they feel disadvantageous, even if I downplay the way I look. Imagine how it feels if pretty much everyone you meet comes with you with a fake personality. It wears you down and makes relationships too difficult.