"Why are people engaged in this industry well-off?" That's because people who study Chinese medicine should read widely, especially some ancient Chinese medicine classics. It is not impossible to have hundreds or even thousands of genuine books. I still need to buy a lot for reference. For some questions that Chinese medicine practitioners don't understand, you may need to consult some Chinese medicine predecessors, and there may be some material exchanges between gifts and things. Therefore, for people who have not been exposed to Chinese medicine, it is often misunderstood as a deep misunderstanding of people who study Chinese medicine.
Of course, apart from the family background, there are very few mathematics Chinese medicine practitioners who are really thick. Ha ha.