Once in a fete we set up a Gypsy Tent and made predictions looking at a Crystal Ball - an empty fish bowl filled with silver foil and glitter. A very reluctant friend was persuaded to pretend to be a 'Face Reader'. She was horrified at first but agreed, when we advised her to "Say anything, look solemn."
Nobody doubted what she told them. We were, err ... she was a huge hit. Next morning she called and declared that she had discovered that she could indeed read faces! She had to be reminded very firmly that until the evening before she did not even know something like Face Reading even existed. [Does it?]
Astrology can make us dream of fool proof short cuts. Remember the last scene of Lage Raho Munnabhai?
Success comes from hard work not astrological short cuts, just like relationships are made with a lot of love, tolerance and commitment, not perfectly matched horoscopes. Astrology made nobody rich, successful or happy, except perhaps the Astrologer and their agents :)
Any computer can tell you where your planets are placed, the tough part is analysing what the placement means. You can go through famous charts (like Gandhi's) and yes it is a lot of fun, but it would be seriously irresponsible to lead someone to believe you can make any reliable predictions.
Astrology is not about Fortune Telling.
Then why do I bother spending so much time studying it?
Curiosity. And some pleasant surprises. No more.
Also a Pisces love for Astrology. Scorpio and Sagittarius can also make you keenly interested in studying Astrology. So long as you don't base important decisions based on it, Astrology is fine :)