I don't believe that ME is a metabolic disease, so not those researchers.
There are hundreds if not thousands of metabolic problems in ME. Its a side that lacks investigation, though we have way too many areas that lack investigation. It is
probably (but not certainly) not a primary cause, but may be a secondary cause in that it induces complications and symptoms. If the immune problem is the itaconate shunt for example, or includes it, metabolism is involved though the cause is an innate immune response. Ditto for any other form of energy generation suppression.
In my view its a mistake to leave any clue untouched. Even if all we do is investigate the links between what we know of the metabolism and immune system its something. Also, neuroimmune issues are dealt with, typically, as neuroimmune issues. Yet we still do not know all the aspects of what that means. Ignoring clues is a mistake in my view, and metabolic issues, long observed, are a big set of clues.
Sepsis, for example, causes a massive shift in metabolism. So does an active innate immune system. Ron Davis' team is looking at this but we need other perspectives. According to Ron Davis our metabolomics is almost a match for that of sepsis. I do not think we understand sepsis either. We treat it as immunological, such as a cytokine storm, but its more than that.
Both the nervous system and immune system are impacted by metabolism, and our metabolism is so bizarre we are likely making too many assumptions about what this means. How do we know that the entire neuroimmune thing is not maintained by metabolic irregularities? We don't.
Finally I have been saying for maybe a decade, though on rare occasions, that metabolic rate testing might in many cases provide data similar to CPET and repeat CPET, though much less problematic. Does our metabolism go wonky during PEM for example?
If nothing else the data could help inform systems biology views of ME.
I do wonder if ME might not be a kind of chronic neuro-sepsis. The brain has its own immune function, and if that gets turned on by a pathogen that crosses the blood brain barrier, and gets stuck on, what does that do in the long term?