IMHO the suppression of intellect regarding ME is partly due to the legacy of the insurance treatments of mental illness in the USA where it cost insurers a lot less to contend ME was a mental illness. As always its a case of "follow the money" a phrase made famous in the film "All the Presidents Men" about the Washington Post investigation into Watergate.
Fortunately the Mental Health Parity Act (MHPA) 1996 and the The Mental Health Parity and Addiction Equity Act (MHPAEA) 2008 changed the financial incentives operating on insurers and I believe this generated a sea change in attitudes which has lead to todays situation where serious research is being done at last (which was not the case in the preceding decades).
https://en.wikipedia.org/wiki/Mental_Health_Parity_Act
https://www.cms.gov/cciio/programs-and-initiatives/other-insurance-protections/mhpaea_factsheet.html
"Follow the money" is the vernacular for an analysis of benefit as favoured by Noam Chomsky in his dissection of the way 20th century media houses served powerful vested interests and were biased in their coverage.
If you consider the beneficiaries of the obfuscation of ME it is obvious that the insurers had natural allies in certain psychologists who lack scruples and have been passive aggressively gaming the academic system for centuries, since the days of Mesmer and long before, using the influence of "eminence" to discourage others who would expose their bluff.
e.g. McEvedy I regret to say was a fellow at Oxford Uni. I am bound to say that one bad apple dont spoil the whole bunch, I studied zoology in the zoology half of the zoology & psychology building at Oxford and I have a rough idea how he got away with the kind of deception he did.
Though invoking the spirit of the allied victors at the end of WWII who had overcome tribalism of feudal and racial arrogance to defeat the evils of Nazism ... but for the grace of whatever you call good, there go we all. Meaning the seeds of it are in us all and it is how we are educated which determines whether good seeds or bad flourish in our minds.
What I am saying is, if I had been tutored by his tutors it could have been me. Thankfully I was tutored to a more rigorous standard of empirical science and warned to beware of human cognitive bias especially with anthropomorphising animals and was trained to be critical of handwaving bunkum. It was a philosophical revelation at the time. More than this, in the middle of my studies the moving finger of fate put me in a position where I need to know the truth about ME and plausible handwavey theories just wont do.
Unfortunately much psychology is handwaving bunkum and no more scientific than mystical theories of the cosmos created by shamanic invention which you might read in anthropological literature on the many different cultural myths of origin. So it is easy to see how the BPS school believes things completely shaped and biased by what they are trying to achieve for themselves to the point that they are completely out of touch with reality and to my mind are essentially the brainwashed victims of a cult of antiscience comparable with scientology, or the "Hermetic Order of the Golden Dawn".
http://www.imet.ie/imet_documents/BYRON_HYDE_little_red_book.pdf
If you consult Dr Hyde's little red book, try searching for "bottle" and read that paragraph on p16 and what follows. That is what we are dealing with.
Our task is to find out what is going on in ME and we are obstructed by a bunch of badly educated if not deliberately groomed BPS cultist trolls who need help deprogramming. Frankly I dont want to even try to get into their heads, pity and compassion are always appropriate for ignorance but IMHO we do best to ignore them completely and focus on the science because that will give us our answers and destroy their power because their power only prospers by feeding on ignorance and uncertainty.
2c