Many excellent cultures and technologies in ancient China have been lost. What is the reason?

Traditional handicrafts, with complicated workmanship, require patience and care, but because of low productivity and little money, young people are unwilling to continue their studies and prefer to go out to work in factories;

Another factor is that many traditional crafts are located in relatively remote and economically backward places, where people pay more attention to survival and life, and do not pay attention to the value of these traditional cultures conceptually.