From "How Do You Practice Responsible Astrology?/For millennia, rulers and ordinary people alike have used the method to predict the future. Translating celestial movements requires great care—and compassion" by Diana Rose Harper (Wired).
Pick a structure, any structure. It's better than chaos. Any meaning is better than meaninglessness. Is that the idea?
But I don't believe that what passes for astrology these days has gone on "for millennia." My understanding is that it was trumped up to write an amusing story about baby Princess Margaret!