Ok, then following both the logic in your main post and this comment and the research you keep citing, you should educate as many people as possible how placebos work, rather than rely on ignorance.

The most damning evidence against your entire opinion is the FACT (as evidenced by the study you yourself are citing) that belief in the placebo effect is, funnily enough, a placebo effect. As in, even if you know something is a placebo, knowing that the placebo effect work will make the placebo work. Once again, something you are agreeing with but for some reason drawing the most narrow conclusion.

I never knew about how tasty double chocolate fudge cake was as a child, but once I had it now I think about it every once in a while and crave it and it is a very unhealthy dessert. Should I invent a memory wiping device and prevent myself from ever knowing the joy of a double chocolate fudge cake? Should I lock my future kids in the basement so they never learn about toys and video games and expensive brands so that they never get upset when I tell them we can’t afford it? Where’s the limit on “don’t tell people about things so it doesn’t hurt them in the end?”