Why did Qin Shihuang burn medicine, divination and agricultural books?

The purpose of Qin Shihuang's burning books and burying Confucianism was to consolidate his feudal rule, which was threatened by Confucian scholars' remarks. The book about "medicine, divination and cultivation" is a book that records how people live and cultivate, which not only does not affect the feudal rule of Qin Shihuang, but also ensures the prosperity of the country. So Qin Shihuang couldn't help burning medicine, divination and agricultural books.