This is one of the reasons I am always suspicious when I read advice about seduction and attraction.
Obviously you don't want a woman who is a basket case because she is so insecure. But really, why would I care if a woman has a lot of confidence? I can see that a certain amount of confidence is sexy, but I find women that are too confident off putting. You want a girl with a positive attitude, but for the most part I see confidence as a masculine trait.
You can tell that a woman wrote this article. I think she's projecting what she wants in a man, and deciding that men will be drawn to the same thing. It's the same type of woman who thinks guys should be attracted to women who work on building a big career.
I like what one of the comments on the article said: "Unfortunately these days, confidence translates into arrogance and selfishness".