It wasn't a fit for our child, but for my chronic pain I've found chiropractic somewhat helpful. Even more helpful for me has been working on the mind connection with biofeedback and therapy and lifestyle stuff like sleep hygiene. None of it is a "cure" that makes pain go away, but all of it can make pain a less central focus of life. Even if none of it improves the level of pain, I think it is worthwhile because living with chronic pain has big implications for life. What will work for an individual will vary, but the key is doing something. There are lots of people with chronic pain and lots of potential avenues for help.
I'm also thinking that some help might come from connecting with other people with scoliosis. If you look at the research compliance rates on using braces are quite low. Clearly, a lot of teenagers have trouble with it.