1) Astrology does not make testable predictions.
One of the reasons why astrology isn't a science is because their horoscopes' predictions aren't testable, their quality and genuineness isn't determined as they are too general, not specific at all, and any stated outcome could apply to anyone, or not apply at all. Nowadays, it is very common that astrologist suggests "today's prediction" of Virgo people, and that thousands of Virgo people claim that the prediction didn't become a reality, but perhaps such prediction was a reality for a scorpion person, for example.