Why is the study of Yi in Chinese mainland less developed than that in Hong Kong and Taiwan?

The mainland pays attention to resisting feudal superstitions, and the so-called fortune-telling and geomantic omen are easily confused. Therefore, in Chinese mainland, we turn a blind eye, while Hong Kong and Taiwan are relatively open. Of course, the publicity effect and reputation of Chinese mainland cannot be compared with Hong Kong and Taiwan. In fact, many Yi-ology masters in Chinese mainland are also very good and powerful. But in the mainland, they are relatively low-key and dare not be too famous. Once their fame and influence reach a certain height, the relevant departments will immediately start looking for various excuses and troubles. So ... . Real experts are generally very low-key, not easy to signal with people!