Astrology only really fell out of fashion due to a perfect storm of a bunch of different factors. The Church defacto banned aspects of it that implied external forces driving human behavior as that would contradict free will, and that happened just about the Renaissance was kicking off and all sorts of new astronomical discoveries led to no greater precision in astrological predictions, along with a more broadly skeptical shift in society, which gradually left it relegated to where it remains to this day.
"My evenings are taken up very largely with astrology. I make horoscopic calculations in order to find a clue to the core of psychological truth." - Carl Jung to Sigmund Freud, 1911
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It's a great example of how what is deemed proper and scientific at one point in time is still heavily influenced by things that, in the future, will be considered 'obviously' nonsense. Even in far more modern times, it wasn't long ago that lobotomization was considered an appropriate psychological treatment. No less than JFK's sister [1] was lobotomized as a 'cure' for her irritability.
If I may ask, who are the people that do these predictions? What is there methodology and how do you know it's not luck?