well yeah, but there's the astrology of the current transits, like the current weather report, but then there is also your own natal astrology, which is going to determine your own subjective biases that you take into the situation, or your own personal tendencies in terms of how you will respond or react to a situation.

of course, these are just general descriptions, for example if you are responding to a situation "like a Scorpio" there is still a big window of options for how Scorpios will behave under certain circumstances.

and of course, we aren't talking about sun signs here, but a complex arrangement of natal placements, aspects, and house/sign configurations.

and perhaps we are all a bit biased towards believing in free will, because to believe that everything we do is entirely deterministic, with no control over our fate or personal accountability, that is a kind of disturbing proposition. We might be biased against it simply because we don't want to believe something that feels unsettling.

However the whole "Free Will" thing is a big can of worms generally, and not something that has a quick and easy answer really.