Well, it shows us that health and disease, are to a large extent value judgements, based on what people are currently prepared, or not prepared to accept as a cost of living. The hard science of medicine is, in large part, illusionary. Science is not value free, and medicine much less so.
Values change, often with alarming rapidity.
When this happens, accepted truth also changes. It has been said that In reality, there are no diseases, only sick patients . Health and disease are value judgements based on more than study of reactions. In reality there are no diseases, there are only sick patients.