This doesn't really work when the people are trying to push it down. It needs an open mind and actual research and diving into.
So if it's 'bullshit', then why hasn't it died out yet? You may think: "But religion hasn't died out either!". Well...religion has all the books, churches and physical 'evidence' behind all of it, apparently buying people into believing it.
But astrology has not. All it has is the astronomical placements and they have been backing it up for millenniums. But that's apparently enough to manage to keep it alive.
Indeed, astrology actually is a valid system and it will probably be used for a very long time.
From a person with a chart highly similar to mine:
""Sir, I have studied it, you have not" -Isaac Newton, Astrologer (190 IQ) said in defense of astrology to disbeliever in Halley (comet discoverer)"