I fully understand your approach… BUT…
Consider an example. If you are pooping blood or have a cough, you may have a pre-cancerous condition or a tiny cancer that can be completely cured by a procedure (cut it out).
If you don't care to prevent or cure a cancer, why even consult your herb book?
BTW there are thousands of "natural" toxins.
By avoiding junk food, candy, soda pops, processed foods, restaurant prepared fast foods, hospital pre-prepared fast foods, and by avoiding dangerous drugs that are not safe nor effective, I am less likely to come down with an infection or cancer.
Here in the USA, the hospital fare in general is extremely unhealthful. There are very few hospitals which grow their own organic food. I would have to travel to Texas perhaps to find one Five Star rated hospital, and then I probably would not be accepted as a patient because I am on Obamacare Medicare, which is a death panel plan.
It is far safer to take a herbal remedy, a time tested herb, than to take a drug, which is a concentrated and synthesized form of the herb's active ingredient. Furthermore, these drugs lack the associated nutrients found in a herb, which all work together synergistic to heal the body. All drugs have a lethal dose (hint: they kill thousands of people per year). All drugs have side effects. All drugs are patented and are not natural.