Miracle cures from obscure European, middle Eastern, Chinese etc. places makes it virtually impossible to find independent evidence to confirm the claim. It explains why we haven't heard of the cure before, because it has been tucked away in a remote corner of the planet. It seems more convincing because we hope other forms of medicine (Chinese, Indian etc.) have the answers to problems western medicine does not.

I do not reject other forms of medicine out of hand, herbs and similar can be very powerful drugs. However, a scam artist will play on your understanding of non-western medicine to advance his/her cure.