Homeopathy doesn't work. Acupunture doesn't work. Traditional Chinese Medicine doesn't work. Faith healing doesn't work. These rigorous studies you're mentioning do not exist.
Believe it or not, western medicine doesn't have all the answers, especially when it comes to chronic conditions. Thinking that steroids and antibiotics will cure IBS is quack science, and that's what's being practiced in western medicine.
"Western" medicine dramatically improved in the last few decades. "Alternative" medicines do not have the intellectual framework or the ability to improve.