Some people tend to consider healing from a merely material point of view and believe in traditional medicine that operates on the physical body. Matter acting on matter. And indeed it works on the physical level, things get cut out sown or even replaced, it is all technically doable.Still the result isn’t always healing. Complications appear, or a chain reaction starts, and so - staying in the physical context - we see the further symptoms as new resolvable issues, and work with them as if they would have nothing to do with the original disease - or anything else for that matter. It is seen as a row of separate physical/mechanical events.
Others see healing as a miracle. A thing, that just happens. One has to pray, believe, and think positive, and the upper forces, God’s will, or the “law of attraction” will do the rest and healing will happen.