Why are there folk experts with accurate fortune telling?

Because they don't really know everything, fortune telling is actually a "guess" made by people with high psychological ability, high emotional intelligence and strong reasoning ability. For example, he said you died in an accident. Come to think of it, whether people die of natural or accidental death is just a guess. If it is accurate, it means that he has high experience and his guess is closer to the "center" of the edge.