Is it true for folk fairy tales? _ The Secret of Folk Fairy Tales

The fairy is so accurate because she is a fairy rather than an ordinary person, so she can be accurate. If ordinary people are not so accurate, since she is a fairy, she must have the function of a prophet, so people can naturally call her a fairy. Otherwise, no one will believe what she said. How can she be called a fairy? At best, she is just an ordinary person.