I cannot create a summary of this article because the search results provided do not include the full text of Matt Morgan's article "Why is stopping a pointless intervention so difficult?" (Why is stopping pointless intervention so difficult?). Available results only contain excerpts and links to book pages by author Matt Morgan, but not the actual medical article you requested to be summarized. In order to create an accurate and factual summary in accordance with the requirements, I would need the full text of the article.