FYI: whether the placebo effect even exists is somewhat controversial (in a different way from does god exist). https://www.google.co.nz/search?q=placebo+effect+myth There certainly is a lot of bad science and misinformation about the placebo effect.
This seems to be a search that contains one editorial-style article (it isn't labeled as opinion/editorial, and is published in what superficially seems to be a research journal, but it is neither a study or meta-analysis, simply a stream of conclusion opinions and just so statements) and lots of secondary reporting of that same article.
So I'll give it some consideration; but yeah... I usually ignore this kind of thing because of how misinformation is first seeded as being "They don't want you to know this" or "Unknown to others, but now you can learn the truth" etc, etc.
So no offense. Just me being my usual critical self.
Edit: I'd like to post this excerpt from the start of the article. It basically reiterates what I was ultimately getting at, while still pushing the authors original point and your point about placebo itself being a myth.
> The fact is people heal and that inherent healing capacity is both powerful and influenced by mental, social, and contextual factors that are embedded in every medical encounter since the idea of treatment began. In this chapter, I argue that our understanding of healing and ability to enhance it will be accelerated if we stop using the term “placebo response” and call it what it is—the meaning response, and its special application in medicine called the healing response.