Is geomantic omen science or superstition?

geomantic omen was originally a science about architecture and home founded by ancient people in China, but later generations became superstitious when it was associated with Yin-Yang and Five Elements.

When emperors and generals in ancient China built tombs, which one didn't choose the best geomantic omen? If it is really useful, the Tang Dynasty should have been prosperous until today, and the Ming Dynasty will not be destroyed by the Qing Dynasty.

Therefore, Buddhism says that a good man will become very good even if he lives in a place with poor feng shui. On the contrary, no matter how good the geomantic omen is, the people who live in it will lose their moral behavior and become worse, which mainly depends on the good and evil of people.