Why did Master Fu Hou say never to tell a fortune?

Please charm is to believe that charm can change fate and help people save the day, right? Otherwise, what's the use of operators? Fortune-telling is just "telling the truth", maybe it's a lie, and the truth is not completely told. But in case the fortune teller doesn't keep his mouth shut, he said that according to your life, you were lucky enough to grab the money and were doomed to be cheated by the spell, right? If the fortune teller says so, it will definitely not work. Because you believe in graffiti? What about the fortune teller? Confidence was shaken. Therefore, faith is spiritual; If you don't believe it, it won't work