This.I would like to add one more. The methodologies used in this stuff are a kludge of many parts, all thrown together because they increase the possibility of a significant result supporting their hypotheses. They have been doing this for decades. They have been teaching and promoting this. They are branded with these methodologies. If they suddenly admit they are wrong then decades of research is now in question. Their reputations are in question. Their income is in question. Their morality is in question. Knighthoods and other accolades might be in question.
They have been doing it so long, for the most part, that everything may collapse for them if they make an about face, especially since big insurance will turn on them too. If not in reality then at least in their concerns about outcomes.
They are trapped by their own history of "success". They are desperate.
All the other hangers on and fellow travellers – insurance companies, other clinicians, governments, media, etc – all have the (superficially plausible) excuse that they were relying on the advice of these medical experts.
The one group that cannot plead that are these medical experts. It was their job to get it right, and they got it wrong, in a very nasty cruel way. So there is now no way out for them that doesn't involve serious adverse consequences for their reputations, careers, empires, incomes, etc. They are trapped by their own incompetence, arrogance, and sheer stubbornness.
Which why they are fighting increasingly hard and dirty. They have nothing else.
And which is also why I have no sympathy for them whatsoever, and demand their immediate removal from all positions of authority and influence. They have proven themselves utterly unfit for their claimed purpose.
I am pretty sure that the senior ones know they have seriously botched it, and that the only option left for them is to keep on denying and obfuscating and smearing, trying to bluster and bully their way through, at least until retirement age.They must understand the seriousness of what they are doing