Well, there are a lot of bad doctors, nero, spine, sleep doctors, and of course chiropractor.
I have and do see many doctors for many things, from nero, sleep, and chiro being the top ones.
The problem occurs with any dr/rn/lpn.pcn/etc trying to promise anything, there is no guarantee in anything getting fixed and in all reality just mitigation is about all you can really help.
As for chiro for IC, that one is a long shot, very long shot IMHO.
I also DO goto a chiro for work on a regular basis, but the chiro i goto is not the one to pop and crack things and snap your neck, he gently will manupulate joints, but morso used trigger point, chiro, muscle stim, traction, massage and even accupuncture to get the muscles to relax, maintain proper "position" and to help the muscles for lack of a better term be more relaxed and balanced. He's not about to look at a patient without seeing the medical history and scans/mri/x-rays and alike well in advance of doing anything. He is actually an M.D. and has worked in a couple different special areas, and is not young and is also as he told me right away, not going to be fixing (Inser a bunch of things) but he does help with the detached muscles and tendons I have and helps with my carpel tunnel and my bad shoulder.
No chiropractor is going to help fix a blow disc, or repair missing/destroyed bones or things along that line. But they can and do help with the muscles that do cause pain and discomfort.
Now, if you goto a any dr that says he is going to cure you, IMHO RUN dont walk to a different doctor. Things can be "repaired" but that will never be 100% that just cannot be, as once its to the point of being/needing work, it will never be as good as factory.
But, if you goto a chiropractor that says they will fix your (Insert major issue here) then also run to another one.
Doctors are for the most part very arrogant, and that to a point is sorta required, to be willing to cut into someone with a knife and/or drill and/or saw and do some serious work in the body takes some confidence and that also becomes somewhat arrogant, but many are IMHO way too far down the line.
Remeber the differance between God and a Doctor....
God doesn't think he is a Doctor.
But, back on topic, I think fixing IC is a long shot, yes possibly if there is a very specific issue with a nerve root and getting the muscles to keep that from being compressed might possibly maybe help...but that is very far from a likely outcome.
Now, TBH remember even snake oil salesmen did sell useful things, taking some laudnum will help with the pain, the same as the dr give you Oxy today, or Vikes, it's just not a cure all as most the snake oil salesmen would say.
Same goes for chiro, its not a cureall, it can help certain things, as also neither is surgery a cureall either.
If you have a overworked shoulder that is bothering you, a chiropractor may help you out easily, and going in for surgery is way too far.
Each call is type of physical work on the body to help you with issues has a place. PT helps with things, as does surgery, and massage helps too.
But you dont go to your thorasic surgeon to help you with a twisted foot/ankle, nor should you goto a chiro for a shattered L2, nor your sleep doctor for a heart attack.
Pick the right tool for the problem, no need for a 20# mall to hang up a picture in the living room.