The question I want to explore is should medical treatments be proven effective in double blind clinical studies before doctors are allowed to recommend them? I think they should.
Hypertension (high blood pressure) is a very common condition. Research suggests that lower blood pressure, statistically, is preferred to higher blood pressure. However, this doesn't mean that if a particular patient is given treatment for high blood pressure that he or she will live longer or have a reduced risk for any particular disease. A person with technically high blood pressure can live a long and healthy life. A person with "normal" blood pressure can have a stroke and heart attack at an early age. And doctors have no way of knowing with any reasonable certainty which is which. But that doesn't stop them treating and billing.
In fact, given that the cause of most patients' high blood pressure is unknown any given treatment can have worse side effects than what the blood pressure might cause. Wouldn't you think the medical industry should be investing in discovering what causes high blood pressure, rather than investing in drugs to lower it? Better to know the cause of a condition rather than treat the symptom. But no, this is not the way of much modern medicine.
Yes, it is possible to lower many patients blood pressure with drugs. But the lower blood pressure may or may not produce better health outcomes. That part is a crap shoot, and is mere quackery.
In my view, doctors ought not be prescribing treatments to patients that they have no means of knowing if the patient will benefit or not. For the most part, drugs prescribed to lower blood pressure are ill advised because we cannot know what the long term effects will be; they are as ill advised as the ancient practice of bloodletting.
What is also interesting is that there appear to be no studies or very few (because I can't find any) showing that lowering the blood pressure of otherwise healthy people reduces morbidity. Wouldn't you think someone would want to know if lowering blood pressure in healthy people actually helped people live longer? It seems not, particularly when a person with high blood pressure can be such a good customer for the drug companies and their physician pushers.
As I say, much of the medical profession remains, as it has for its entire history, mere quackery.