The problem is that you're butting up against the highly profitable cult of ignorance. For instance if something isn't intended to actually treat a disease, then it's basically exempt from FDA regulation as it's a "supplement". Then the seller is free to imply whatever they want, regardless of efficacy.

I'm advocating something that ideally can sit in the middle of the two philosophical/regulatory regimes with more people on board - being able to buy whatever you want, but regulation aimed at preventing companies "innovating" by simply confusing the market. And while I'm sympathetic to extending the scientific-maximalist approach onto the "supplement" industry that is currently harboring copious amounts of straight up fraud, I would also say that throwing down such a gauntlet doesn't seem like a great idea at the moment!