What do you mean by quack science?Yeah no a chiro shouldn't ever be an option. May as well go to an acupuncturist.
Look they've got to study physiology, as they are still working on the human body, they just aren't studying the same things as a doctor specialising in the field of orthopaedics would. Their whole ideaology is based on quack science
I have some back issues and I've consulted with an orthopedic surgeon who actually had no issue with my back being managed by a chiro and a biokineticist. The things my chiro tells me seem to make sense (granted I'm an engineer and not a physician, so take that statement with a few grains of salt).
You seem to be classing chiros with homeopaths and acupunturists - I'm not sure that's entirely fair... I'd say more along the lines of physiotherapists or podiatrists.