What is the basis for the blind to tell fortune?

Why do blind people tell fortune? Are they really born blind by peeking at the compass? ,,,,,.？

From a psychological point of view:

It is generally believed that fortune tellers are blind, and blind people can also tell fortune. This may be caused by some factors, such as TV dramas and novels. ...

Peeking at the compass? I'm telling you it's impossible. Why? Because you can't be a fortune teller once, and you won't pay so much for it. Why do you say that? Because suppose the fortune teller did the math once, peeked at the compass, and was blind, then how can he see if he is blind for the second time? How can he tell a fortune? You can't even tell a fortune? Are you a fortune teller? You are a fortune teller. You know the lottery winning number, and you help others calculate their fortune-telling names.

I think: this is just my own assumption: people can predict the future when they sleep, that is to say, when people are in a space and divide the space into countless parts, one choice will connect a space in series, thus forming you, and you will have different choices in different spaces. You just make different choices in this space. Fortune telling doesn't exist, because he doesn't know your choice, and you can only control your own destiny by yourself! ~