B.A.
While some do have bones that genetically malform or have weak structure connections I am thinking that sure try a chiropractor, but also check diet. My SIL had scoliocis and when she was finally correctly diagnosed she had celiac, which meant she may have been eating right but not absorbing enough nutrition to build her bones the way they should build, and make the tendon, ligament connections strong. She found out when she was 42 and her curve was really exaggerated even though it had been "braced" in childhood. All I'm saying is take a look at all avenues, make sure they eat well(healthy and balanced), get plenty of weight bearing exercise and don't sit in front of a tv or computer too long each day and that they use good posture when both sitting, standing.
It is always good to look for a why something is happening before letting a doctor go full ahead with a treatment plan, invasive or not.