Good point, @Invisible Woman, another stigmatization of ME. Most dismiss it, so pwME with mild cases may dismiss it too, or are too busy struggling to stay afloat to find out about ME. The medical guidance they get may be, or is frequently incorrect.
Also, at the milder end of the scale, pwME may not have received a diagnosis, or
doctors may tell them they will get better, which at this point in scientific development is probably faulty
management. Their mild form may worsen, and then they're hooped.
In my opinion, the mild cases are even more confounding, because they cannot be clearly diagnosed. I believe, based only n=1 of personal experience, that there is a mild phase of this disease that does not include the post exercise crash.
But that is the unique feature that differentiates it from other diseases, so without Abnormalities in standard blood tests or other easily identified symptoms, there’s a little weight to know what you have, unless you throw a larger but driscriminatory net of symptom sieving. The symptoms noted by Ramsey in the 1950s are actually very helpful for detecting the early phase, but nobody reads his papers.