Astrology was really successful in providing them with a false sense of relief as to why the marriage hasn't happened so far. The subject is especially good in finding out reasons where none exist.
I don't mean that astrology is all crap. I do have a deep respect for it. But astrology is not something which can provide real explanation to each and every problem in your life. Its an enormous guidance system which was designed based extensive studies of lives of a whole lot of people over centuries. The system consists of a huge set of rules which when applied after thorough study can at best describe general trends in one's life. It helps you in identifying risk areas and potential directions of success in your life. And it requires years of deep study to become proficient in the art of astrology. But in the end, its a rule based deterministic system and man's will is powerful enough to change anything in the world if he so wishes. Man is as bound by the rules of nature as he allows himself to be and as free of the rules as he wants to be.
Moreover a system like astrology is a heuristics oriented system based on studies of real life experiences. Hence it needs a constant re-invention and updates based on new observations as they keep happening all around in the world. This is something we have forgotten in this age and time and have ended up having a system which is pretty much stale and lifeless.
At the moment my friend is worried since his parents have started taking astrology too seriously.
