It is a way to increase their income.

I'd like to know what your chiro charges for that benfotiamine and at what dose and how many in the bottle.

Doctors don't know much of anything, unless a drug rep shows them. And even then some or all of what is shown them is distorted to make the drug look good, so the doctor will prescribe it.

PubMed is full of papers from around the world that show how some non-drug interventions work wonders. But the doctors do not read them, even tho other doctors did the studies.

In my opinion after a decade online, learning all this, our medical system is pretty pathetic. If you get shot with a gun, hit by a car, or have a heart attack, or stroke you may get some fancy medical dancing. But for day to day life, health, comfort...kiss it goodbye.