This argument gets invoked a lot when it comes to medical dishonesty, but I really don't think it applies in the case of ME/CFS. If we could find the pathology behind the condition, there is huge money to be made in pharmaceutical treatments. Just look at the enormous amount of money being made treating auto-immune illnesses with Humira/Skyrizi/Xeljanz/etc, treating diabetes with GLP-1 agonists and CGMs, and treating obesity with GLP-1 agonists (and depression before all that!). Sometimes treating the chronically ill is the most profitable option.