Earlier quoted context omitted.
There is no qualitative difference between belief in astrology and any of the world's religions. Not saying you're not entitled in disregarding astrology believers but the cut-off point is completely arbitrary and dare I say irrational.
I would argue that astrology is in principle testable and it should be able to make concrete predictions. Obviously, popular astrology uses such woolly terms that all of the predictions can be interpreted as accurate to the believer. However, the few times that anyone has tried to verify astrological predictions, it's turned out to be false. https://psycnet.apa.org/record/1986-30007-001
It's related to why MBTI lasted so long as "science" because it proved many concrete predictions through overfitting and hand-waving away errors as statistical anomalies rather than the pigeonhole principle at work. There are still plenty of people that think it valid. Perhaps ironically, MBTI even seems to making a comeback among many of the same people that are flocking to Astrology. If you're going to live by one pigeonhole fallacy you might as well live by more than one, I suppose.