My take is that it's unreasonable to expect most of the population to be mostly skeptical of the products they consume most of the time. I think most people have the feeling that things they buy at the drug store or GNC will not actively harm them; I don't think they understand that the supplement industry is essentially unregulated. I think they have about the same level of trust in supplements as they do in, say, buying meat from the grocery store. My position, then, is rather than acceding to the existence of the bad actors, we should use regulation to prevent them from existing.
An editorial from a medical researcher who thinks the FDA is under-performing in even the light regulation they have of the supplement industry: https://jamanetwork.com/journals/jamanetworkopen/fullarticle...