hi doma,
yes. i think modern medicine is excellent. but in 100 years hopefully it will be better.
i don't doubt the existence of self-healing. first, we have our immune systems. then, the power of our minds generates a placebo effect. third, we can do things to improve our condition (diet, exercise etc). medical cures must create results which exceed the placebo threshold and which do not derive from actions of the immune system or exercise. so recovery is a layered thing. medicine plays its role.
but for sure, i believe what i believe based on processes which seem substantial to me. a cool story with an explanation that makes sense in those terms is not going to challenge the architecture of my belief.