There is no doubt in my mind that being familiar with astrology (plus having achieved the even more difficult goal of being objective about yourself and others) can be really helpful with everyday life. After a while, with practice, you can really figure out those times where your job, or your love life, or your finances are going to get better (or possibly worse).
But even the world's best astrologers can get things wrong on occasion. This can be especially true with relationships. A friend of mine recently sent me a birth chart for a potential love interest, and she was puzzled by why it is that, on paper, they look so compatible -- and yet the guy has apparently shown little or no interest. Believe it or not, this is not a failure of astrology. You see, it turns out that this guy has a tiny little alien living in his head.
Think of the birth chart and the transits to it as a wiring diagram. And not just for a simple circuit like the strobe light I made in grade 11 electronics class, but something complicated, like one of those so realistic it's spooky robots. You can tell an awful lot about a wiring diagram. But we're talking about human beings, not toasters.
And speaking of robots, did you ever see the movie Men In Black? If so, you will probably remember a species of alien who look just like human beings, except they are really robots with a tiny alien living in their head. The alien operates the robot in much the same way that someone might operate a forklift.
The birth chart and the transits and the progressions and so on can certainly serve as an accurate wiring diagram as to what's going on, or what is going to happen in future, or personality. But this guy who isn't showing interest in my friend? He's got a little alien operating the show, not in his head but in the middle of his birth chart. And that alien is what we call "free will."
And if you think about it, there's a little alien in the middle of your birth chart calling the shots too.