If you think about everything that happens in Nature, there does seem to be some sort of master plan at work. The problem is that we do not usually see it. We do not see the point of weeds, mosquitoes, flies, etc. All have a purpose. Each time something needs healing, there is a plant for that. It can be animals or people. Each time immunity needs to be changed, there is a bug or a virus for that. Even when people need to change locations, it is usually because of an act of flood, earthquake, volcano, or other natural so called disaster. The disaster is, of course, that people desire something different.