Why do some people say that the Book of Changes is used for divination?

Zhouyi was originally a divination book. Ancient natural disasters and wild animals made people fear nature and gods, so many divination methods appeared. Fuxi created Zhouyi as a divination method, observing nature and summarizing it in order to talk with God. Confucius also used it to divine, understand God's will and follow the heaven. Reach the highest state of human behavior, that is, harmony between yin and yang, harmony between man and nature.