Blind people don't tell fortune.

Why are most fortune tellers blind? Great gods, help!

See: As we all know, fortune telling is just a popular saying. Its scientific name should be "Pipazi" (the most popular name, everyone knows) or "Four-pillar prophecy". Pi Bazi's theory comes from heavenly stems and earthly branches's theory of Yin-Yang and Five Elements. Anyone who studies can master this mysterious method, not only the blind. People often say that blind people tell fortune because people who write eight characters are often blind. They have many fortune telling formulas, but they never write them down. They only teach orally among the blind and never tell others. Therefore, over time, there are fewer and fewer discerning people who know the method of fortune telling, and most of the fortune tellers who can see are blind. In the past, there was no practical arrangement for the life of the blind, and the basic living requirements of the blind were often not guaranteed, so they had to make a living on their own. Because they can't see, they can't do much work, and fortune-telling provides them with an excellent means of making a living. First of all, at any time, human beings have a mysterious sense of destiny, they can't get rid of the fear of the god of destiny, and they are eager to grasp their own future. From the grassroots people to the real dragon emperor, all this is true. As a result, fortune-telling came into being and lasted for a long time, which is the long-standing social and psychological basis of fortune-telling industry. It is very difficult to engage in social labor or natural science research, but the basic eight-character grading method is much simpler and can be mastered by the blind. Secondly, although the establishment of the batch eight-character method requires a lot of astronomical geography knowledge, once the batch eight-character theory is formed, it will be much easier for future generations to master it, and learners do not have to understand astronomical geography. This is just like the designer of a TV set must be proficient in physics at first, but after the TV set is designed, ordinary workers can also produce it according to its design drawings. For judging the eight characters, the judging rules are fixed, just remember them once, and what will change is only the method of checking the perpetual calendar, which is not difficult for the blind. Therefore, fortune-telling has become a profession handed down from generation to generation by the blind. It can be seen that fortune telling is not the patent of the blind, but also the patent of the discerning. Moreover, historically, it was the discerning person who initiated the eight-character method and wrote books for the eight-character theory and method. The discerning person played a decisive role in the development history of the eight-character method.