It doesn't have to that doctors are bad at their jobs, but rather that they're humans, and humans are hardwired to try to make other humans happy, and patients like being actively given treatment as opposed to "have you considered sleeping well, eating well, and just letting your body do its thing?"
The sources that the article has, an article in the BMJ[0] and Cochrane[1], are actually targeted at primary care physicians (after all, random laypeople don't read medical journals!), to basically tell them to chill, and tell their patients to just let themselves be.
[0] https://www.bmj.com/content/348/bmj.g3680 [1] https://www.cochrane.org/news/featured-review-are-general-he...