It seems obvious from many posts on here and elsewhere that T3 testing and provision of the hormone is taboo in the NHS- apart from Endos, who again seem to have thyroid 'blindness by TSH numbers' in many cases.
If the T4 issue has been fudged for decades, with established protocols with NDT all but forgotten, how much more difficult to get a replacement therapy that will cost more and be more difficult to manage- even if more effective?
T3 doesn't seem to cause depression- it actually lifts it, so that's another escape route out of the window for our harrassed medics.
It's hard not to be a conspiracy theorist these days but humanity's been 'at it' for millennia and money's short -like the will to address thyroid illness properly.