The orthopedic surgery industry has a long history of overselling the benefits of surgeries, attacking anyone who points out the lack of evidence for their treatments, and continuing to push for the over-use of surgical procedures even when all scientific evidence swings heavily against it.
Many journalists, researchers, and even surgeons(!!!) have written books on the unwarranted confidence surgeons place in their diagnoses and treatments and the financial incentives that keep the industry going.
This article is a good place to start learning the truth about orthopedic surgery: