I'm always confused as to how a certain plant can be consumed daily but also be a cure for 10 random unrelated diseases. It really seems like magical thinking.
Where I'm from people give these magical properties to garlic.
The plants have many different constituents. Some of those constituents may have an effect on systems that are widespread throughout the body, just like aspirin has a reputation as a cure-all because it affects the blood to reduce inflammation and blood goes almost everywhere in the body and inflammation causes many kinds of health problems. Consuming the plants daily might also be part of what makes them effective, the constant lifetime presence of a small amount of the constituents. Many things that have long term good effects on our bodies we simply call "food".
That these have not been well investigated by western medicine is just bizarre. The common excuse is that there is no profit there for the drug companies because they can't isolate one ingredient to turn it into a profitable drug (ignoring that it may be the combination of ingredients that makes the difference). But the NIH funds most of this kind of research, so you can't blame it just on the drug companies. These kinds of "weeds" have been "understudied" for decades, which after that long seems intentional. Western doctors do not seem to be curious about these weeds either; they'll prescribe a prescription medicine off-label not really knowing if it will help, but they won't suggest trying a herbal remedy with a multi-thousand year history. It was medical dogma for decades that these weeds are not effective and most living doctors were trained to believe that and still practice it, regardless of what the small amount of new research has started to show in addition to the long term use by billions of people.
Garlic has mild antibiotic properties and antibiotics can help treat a wide variety of different diseases that may manifest differently but are all related to bacterial infections. Given how little we understand human biology the fact that a single plant helps with several seemingly unrelated diseases may be a strong clue that those diseases are in fact related. We'll never know until the studies are done which will require researchers to become humble. Perhaps there is research ongoing in other countries like India?
Where I'm from people give these magical properties to garlic.