How to calculate the monk fortune-telling booth?

Is it possible that the fortune teller standing on the roadside is a real monk? At best, he is just pretending to be a monk and deceiving others. How can such a person take what he said seriously? The Yi-ology such as numerology and Zhouyi is not without its truth and value, but it is not easy for ordinary people to understand the mystery. Real masters don't and don't have to set up stalls in the street at all.