But this already happens for certain treatments. The FDA already regulates a separate category with loose efficacy requirements for dietary supplements and herbal remedies. These medically irrelevant treatments are immensely popular, they're just forbidden from marketing specific medical claims and being actually toxic. People still end up taking FDA approved treatments like Ivermectin for non-FDA-approved purposes based on Facebook recommendations.
Why do we always have to make people's choices for them? They're grown adults capable of making their own decisions and their own mistakes. If they want to ignore the science and the credibility of the FDA process, they should be free to do so.