I don't know how much of a response you'll get in regards to this in a weightlifting forum, but since I'm on here and in practice, I'll throw in my .02
I have heard of them, and to me it's a bit of a trivial argument. We should focus on these things (HA, NP, LBP), because in reality medicine as a whole just plain sucks at it. Mainly because the biopsychosocial model of practice is just now finally being embraced. These 3 complaints have huge psychosocial implications, which in the past have been approached and solved more efficiently through taking a whole patient approach (ie chiropractic).
Part of the big problem in chiropractic are the idiots who want to cling to BJ & DD's philosophy, and not make any progress, add to research, etc. It's nonsense, ignorant and simply dangerous, not only to the profession, but to the patients they encounter.
Although more recent grads are equipped with the knowledge base, experience and education to be the leaders in these areas, many MDs, PTs, etc view the profession as frauds and charlatains, and will therefore not refer their patients until you prove yourself time and again, and maybe not even then. Is it professional bigotry, in some cases yes, but in the case of many chiropractors, they're dead on. In the town I practice in, the community would be better served if 1/2-3/4 of the chiros here were not in practice. There is a HUGE difference in practice styles between chiropractors, which the majority of the populations doesn't know about. A dentist is a dentist is a dentist for the most part, a nephrologist is a nephrologist, etc etc, but the gap between the Haves and the Have Not's when it comes to chiropractic isn't so much a gap as it is the Grand Canyon. Unfortunately two things suffer, when it comes to that, the profession, and the patient. The only reason some people in my town are in practice is because the old saying is true- Sometimes even a blind squirrel finds a nut once in awhile. They get a few people well here and there, the others they treat until they eat their insurance and then they cut them loose with little to no improvement. It disgusts me that it happens, but it does far too often.
I could go on for days, so I'll end now, feel free to PM me and we can have a chat. What school if you don't mind me asking?
Edit: Disregard, saw that you're at Cleveland