Hello Stillsguy, welcome to Sjogren's World. Thanks for chiming in here. As you will see as you get to know us, any and all input is of great value, and I learn from all comments, and hope that others do too.
I understand your point, and because there are subtle variations in the definition of the various forms of hepatitis, its easy to interpret in a number of ways.
I was basing my comment on the evolution of the immune system in some people after infection with the hep C virus, resulting in autoimmune hepatitis, which is considered to be a different form of the disease. Of course my comment is only my opinion, and while it is shared by the medical people I deal with personally, I know there are many schools of thought on the subject, and there is a good case to be made for Hep C being exclusively an autoimmune disease.
Infection with the hepatitis C virus (HCV) can lead to autoimmune hepatitis in a minority of patients. This means that the liver cells are damaged not only by the virus but also by the body's own immune system. Not all people with Hep C will develop autoimmune hepatitis, and not all cases of autoimmune hep are preceded by Hep C.
Autoimmune hepatitis triggers the body to attack its liver cells, as if the liver cells were harmful foreign bodies. Patients with a combination of HCV and autoimmune hepatitis generally suffer from more debilitating symptoms than patients with HCV alone. Autoimmune hepatitis is associated with other autoimmune illnesses, including thyroiditis (inflammation of the thyroid), diabetes mellitus, and ulcerative colitis (inflammation of the intestines). Although only a few patients with HCV develop autoimmune hepatitis, these patients appear to have a genetic predisposition that makes them more likely to develop autoimmune hepatitis, compared to HCV-infected individuals without that predisposition.
As you can see, I agree whole heartedly with your comment about the combo of the "bug", genetics, and dumb luck contributing to the development of the disease.
Diseases like autoimmune hepatitis, sarcoidosis, and adult onset Still's Disease, which often result in CTD following infection with a virus, are generally referred to as immune-mediated inflammatory diseases.