What does the fortune teller mean when he goes down the mountain?

There is a fortune-telling grandmother near my home, and everything she says is quite accurate. Is fortune telling credible?

It is better to believe that it exists than to believe that it does not exist. There are many things in the world that science can't explain, but you can't say that they are all false. You know, every 100 years, 30% of scientific theories will be overthrown, and then new knowledge will be born. Ghosts and gods, magic, may all follow some natural laws, or they may all be just that we haven't discovered them yet. However, fortune telling, which has been handed down for thousands of years, can't happen out of thin air. It's good for you to be skeptical.