Astrology is a metaphor. A bit like MTWTFSS is a metaphor for that period of time we call a week but which has no reality outside of religious organisation.
Explaining the science in back of astrology and why the metaphor is necessary is obviously pointless when directed towards those who hang breathlessly upon the words of Mss Mary-Jane, Carol, Kathryn, Judi, Debra, Donna and the aptly named Kane and pass by Oswald Spengler on the grounds that they can't understand a word he said and so they are jolly well going to stick to the simple stuff such as-
Quote: And why does mom have brown hair and I have blonde hair?
through thick and thin with a rictus glee on their fissogs and, worse than that, much worse, attempting to distract young readers here from the words of a master and thus provide a glimpse into the future should we ever allow them to get their greedy and grasping hands on the educational system so that they can render everybody's mind as arid and materialistic as their own.