Yony, I don't take a strongly deterministic view of astrology, because even with "orthodox" traditional readings, each planet, sign, and house has multiple interpretations that are consistent with the core meanings.
Then astrologers are often flat-out mistaken in their analyses. Astrology is not an exact science.
Much of the history of western astrology is tied up with the Christian, Jewish, and Muslim beliefs of the best known astrologers of the Middle Ages, Renaissance, and modern period. These religions all stress "free will," or what I would call moral choice.
We're not just pre-programmed robots, playing out a script.
Then neuroscience is yielding all kinds of information on human behaviour.
Ancient astrology was much more deterministic. The ancient Greeks believed human lives were determined by 3 fates. The fatalistic Stoic philosophy was adopted by astrologers who saw in the heavens the mechanism by which one's fate was determined.
The famous ancient astrologer Ptolemy, as a confirmed fatalist, nevertheless believed that the horoscope permitted some wiggle room. He noted that nobody would go to a doctor for a cure if the course of an illness were strictly inevitable.
Fatalism and determinism are not essential to the practice of astrology today.
You've probably come across the statement, "The stars impel, but they do not compel."
You might be interested in the view that astrology is a form of divination.