The Roll of Inflammation in Disease

In my opinion perhaps not all but maybe a significant percentage of diseases are caused by inflammation. You know how when people get a cold some will always get a sinus issue while another person will always get a respiratory cold while another might always get gut problems? The bugs will attack the weakest part of our body most of the time. What if most chronic diseases were just inflammation attacking the weakest most vulnerable part of our body. In one person the inflammation might effect the intestines and this become Crohn's disease. In another it might attack the small joints like fingers and toes and this becomes rheumatoid arthritis. In yet another the inflammation targets the brain and someone comes down with signs of Alzheimer's. So maybe most diseases are just one disease.