That isn't true. The practice of chiropracty is founded upon unsubstantiated (and apparently false) claims, and many chiropractors make additional absurd claims.
I know there are chiropractors who admit that much of what they were taught in school and what many chiropractors claim is utter nonsense. Good for them. However, chiropracty is best judged on the princples of chiropracty. Those principles do not hold up to scrutiny.
If someone helps you feel better, you may not care whether or not he claims that Elvis's ghost did it, but ideas are supposed to be the specialty of universities, and such nonsense cannot be ignored by them.
That's all I'm saying - most of them are quacks, but there are a few good ones out there.