DNRS is very different from graded physical therapy. You're missing a key component: limbic system dysfunction. Graded physical therapy does nothing for the limbic system, programmes like DNRS, Gupta etc are focusing on the limbic system. There are plenty of recovery testimonies from people with severe ME/CFS.
Also, who said that "With ME you have mitochrondral fragmentation from excess viral load" ? There are plenty of different causes for mitochondrial dysfunction, so why putting yourself in a failure position by saying "I have a virus and DNRS can't do anything for this"? No one knows for sure what are the causeS of ME/CFS, there are so many different causes, so many different recovery testimonies... Many causes, causing the same kind of mitochondrial impairment, and many ways to recover. An open mind is our most useful tool.