I don’t think drugs can do everything - or do everything safely.
A cure for cancer is probably going to wind up being a combination of lifestyle adjustments and nutrition, as well as drugs.
(Research on low-carb and Ketogenic diets has suggested that they work for lots of people. And they aren’t that difficult to stick with. A lot of people are already making a lot of money promoting these - but nobody is going to find a pill that obviates the need for the effort involved in personal change and commitment.)