Traditional Chinese medicine is a big concept. Some people have never learned it in their whole lives. Some people only know prescriptions, some people only know acupuncture, some people know qigong, some people know massage, scraping and other strange medical knowledge. It is impossible to learn all of them. Perhaps only Sun Simiao can do it in history.
Health preservation is to prevent diseases, and prevention is above treatment. The ancients put great emphasis on treating diseases before. The highest state of TCM health preservation.