Of the people I know that strongly believe in things like astrologists, psychics, or religion a large percentage also believe other absurd conspiracy theories such as vaccines causing autism, the moon landing being fake, etc.
I think we set a dangerous precedent by allowing people to blindly buy into things like astrology, without calling them out. I of course don't believe these kinds of things should be made illegal/regulated as people should be able to make their own decisions, but I also don't think they should be humored and blindly tolerated by the rest of the population.