Gee...okay so...how about the people who think it is all BS would make a chart like Thursday or me linked above and we see what comes out? Nobody ever took that chance.
I am not sure why people think that the Planet or the Stars make you how you are. This is more a tendency thing. And funny is, that this thing works pretty well. Probably we have to divide here: there is the BS Astrology that you read in the newspaper each day, and there is the real Astrology.
The BS thing is that stuff you read in the newspaper. That is often sooo very off because people writing those things look at ONE "random" Zodiac Sign only, which almost never works.
Then there is the real Astrology thing, where you have to put in your birthdate, the coordinates and the time. That is very individual and fits to around 90% minimum. But again, this just works because people have been studying Planets for Centuries. They studied - let's say - people who are Cancers and found out "Okay, they often are like this, this and that". They found stuff in common. Also the Planets always had certain meanings for people, like Jupiter for example, who is said is the "Planet of luck and success". So the scientists put it together. It's not the other way round like some of you seem to think. =/
What I also don't exactly get is how some people would think of persons who consider Astrology a useful tool. I mean it's not that I go around and type everything with Astrology, tho it is always interesting how good it works. For me personally Astrology is a possibility to understand people better, just like MBTI or any other science. So agaaaaain: Chill-Pills, dudes!
If you'd read my personal chart you could really recognize me. It is pretty accurate. It's always stunning again.
Oh and let's not forget your personal influence on all this: you might be typed as Sagittarius or if we take MBTI INTJ or whatever, but that doesn't mean you are stuck with it. You can work on yourself and on things you don't like about you. So in the end you might still be a "whatever", but the profile won't fit you to 100% anymore.
Those things are really helping tools only, not "life-religions". Because in my personal opinion it is THEN when it gets dangerous and "stupid".