Sounds like this was written by an MD. They hate chiropractors.
Some are charlatans, some are real healers. I’ve had good luck with a couple of them through the years.
The "real healers" are the ones who have perfected the art of eliciting the placebo effect.The charlatans haven't.
I agree
I found several back-crackers who were of little use. Each time I went, the relief was shorter and shorter. Then, I found one in Chatham, NJ that used a technique that didn't involve back-cracking. And every time I went, the relief lasted longer than the previous time. (I don't remember the name of the technique, sorry....)
So, some techniques are better than others for me. I don't expect that what works for me works the same for everybody. My guess is that by randomly assigning patients to practitioners, they lost the signal in the noise. It'd be like testing for sickle-cell anemia in Japan. The study would say that it doesn't exist.
In the longer run, curing my sarcoid has also greatly relieved my back troubles.
I have conflicting reports from people I know. In one instance the pyroquacktor's diagnosis was identical to that of the physician. The treatment was similar to that given by the physician-referred Physical Therapists.
But I have noticed an odd thing with those Chiro's I have known socially. Over time, some of them have a "Creeping Expertise" problem, for whatever reason, and proceed to give opinions in many fields in which they have little or no background. I have over the years had two of them give me lectures in Hardscience, as I glanced side to side for a graceful exit.
When this malady extends to curing cancer (Or piloting UFO's, etc.) by bending spines, it's time for the butterfly nets.