Well, as someone who has had lower back problems since 1991, I can say I've tried everything listed here and many more not listed. My chiropracter still helps as much or more than Canadian Back Institute (a joke) craniosacral therapy, rolfing, active release, therapeutic massage, accupuncture and and the orthopedic surgeon. (waited 9 mos to be told it couldn't be fixed by surgery---thankfully!)
One procedure that helped me over time was prolotherapy---most folks have never heard of it, and it was hard to find anyone who could perform it. Used a lot by pro atheletes---which I certainly am not! I used to drive to Red deer mostly, a doctor there did it. It is saline injections into supporting ligaments (lower back for me) that have stretched due to injury; it causes local tissue irritation which stimulates additional ligament cell growth. Strengthening exercises will do absolutely nothing for ligaments; the best you can hope for is to strengthen muscles in the same area. Prolotherapy actually causes new tissue growth over time. I used to go every 4-6 weeks, get about 8 spots injected in lower back under local anesthetic, and over time, my sacroiliac was much better, more stable, less likely to misalign from certain twisting, bending movements.
Now the odd time that I do need a Chiro visit, it stays aligned much better. And doing lots of core stability exercises also has helped.
There are always people who think chiros are quacks, but there are useless people in many professions. Look at the wrong cancer diagnoses by the hundreds in those clinics in the Maritimes. So using Sundance's logic, everybody in that profession just must want you to die.