The fact that a process sustains itself does not mean it started the disease, nor does it necessarily follow that shutting it down will cure the disease even though that is what we do in modern medicine:
In diabetes we lower glucose without reversing insulin resistance. In heart failure, we reduce sympathetic tone instead of addressing the underlying myocardial injury. In chronic pain, we treat the pain but almost never the underlying pathology. With dysautonomia, we treat the nervous and vascular systems but never the immune.
Modern medicine, in an effort to keep everyone on as many drugs as possible, has deeply distorted our understanding of causal heirarchy and etiology. It's medicine's greatest grift.
Examples of etiology(cause, not mechanism): viruses, bacteria, improper diet, taxation, emotions, trauma...