This is true for other very effective cures: vitamin D has a similar story.

There is no money in cures that target the root cause which is often basic nutrition and using the biology as it was designed, instead drugs can be invented, patented, and when everybody takes them there isn't a control group left to notice that in aggregate they make things worse. And the doctors are indoctrinated to know nothing about nutrition, to be fearful or dismissive of supplementation (see: vitamin D) and believe there is a pharma drug for every condition.

The good news is it's rather easily fixable, but it is something that will never come from top down, it is and is going to be a bottom-up process.