What's up with all the tarot astrology Crystal people?

I've met post graduate level people who believe in astrology, tarot cards and energy crystals. What gives? I understand these beliefs probably haven't caused murder and Mayhem on the order of some other religions, but its ignorant and it's holding us all back.

Edit: I'm not talking about people who read horoscopes for fun or dabble in Tarot at the Renaissance fair. I'm talking about people who genuinely believe in the predictive abilities of these practices ( and give their hard-earned money to so-called gurus and experts) as those who seriously think the month of your birth relative to the positions of planets and stars that are incredibly far from each other and only aligned based on our tiny little perspective, actually influences their destiny.