Why not set up a patent for Chinese medicine formula, or a unique formula harvested by an individual?

Hello, it is difficult to judge the prescription patent of traditional Chinese medicine. Guizhi decoction, for example, is composed of cassia twig, white peony root, ginger and licorice. If this is a patent, increasing the dosage of Guizhi will be changed into Guizhi Jia Gui Decoction, and increasing the dosage of Paeonia lactiflora will be changed into Guizhi plus Shaotang, which are all composed of these drugs, only for different diseases. This makes it difficult to protect or develop patents. If there is too much patent protection, it will also make it impossible for other Chinese medicine doctors to use it. It will also cause trouble to the development of Chinese medicine. Moreover, Chinese medicine pays attention to different treatments for the same disease, and different diseases may use the same prescription. There have been papers on the Internet that Guizhi Decoction alone is used to treat 1000 kinds of main symptoms or symptoms. If you apply for a patent, you can't explain all the uses of a prescription clearly, which will bring many problems to patent rights protection in the future.