Astrology, cafedology, palmistry and all sorts of divination stuff works are very well explained in what Psychology calls the Barnum Effect or the Forer Effect. It basically works like this: The "readings" or explanations are so vague and evasive that a person "looking for an answer" will interpret the reading according to his own problematic. It has to do with some sort of internal predisposition to turn everything being said into a "meaningful" thing, hence, astrology has got something for everyone. I once was poking fun to my cousin who is into these things, by reading her the horoscope of Leo instead of Virgo that she was. At the end I asked "do you thing it is reliable?" and she answered "definitely yes, I was feeling the exact vibe today". :)
The 'horoscope of Leo' has nothing to do with astrology. Horoscope is from greek "time watcher", most likely meaning guardian. And it is the snapshot of celestial bodies against the ecliptic at this time or that. And if you follow the rules about reading them, they aren't vague. :->
But yeah, mostly what is described in the article is correct. The main purpose of divination is to make you think. Too bad that for a lot of people consulting a diviner is an excuse to continue not thinking.