This much is certain; Chiropractors cannot cure scoliosis, and if they make even a small mistake, you can be paralyzed for life. It takes great skill to manipulate the spine without causing damage, something that should be left to a physical therapist (around here you can set up an appointment with one to work on your back). You take too many risks with a Chiropractor, I think. There's too much of a gamble when trying to find a legitimate practitioner in that field.
Although I am not sold on the benefits of chiropractic, what you've posted here is just fearmongering. Paralysis is
extremely rare as a result of chiropractic treatment--and certainly much less likely than if you had invasive back surgery.
I suggest you read the Mayo Clinic's
overview of chiropractic care.
Chiropractic care, beneficial or not, is generally safe and statistically less risky than back surgery.