Thank you for a very detailed, articulate and eloquent description of October 22, 1844 and it’s unfortunate aftermath of the Sanctuary doctrine.
It is very clear that the Millerites were humiliated, mortified and hugely embarrassed by their failed prophecy. They were “grasping at straws” when they fortuitously came up with the face saving Sanctuary “snake oil” solution.
For me, the fact that the whole doctrine relies on a very abstruse academic date, 457 BC, as its underpinning, makes it hugely suspect.
Bible doctrines should be able to be understood by humble, poorly educated, semi-literate,believers. The start date of this,prophecy required historical research in archeological ancient history tomes buried in Ivy League libraries. That makes it too complex, too inaccessible for the average Joe or Jane and therefore probably invalid.
Very dismaying, is the fact that no other Christian theologians, seminaries, nor academics have subscribed to it nor endorsed it.
As you point out, if EGW had not been intimately involved in the doctrine’s origin and proclamation, it would have been jettisoned long ago.
Christ exclaimed emphatically and unequivocally three times in the last chapter of Revelationm, BEHOLD I AM COMING SOON!
Had His father not informed Him that no way could He proclaim that – He had some magic mission to fulfill nearly two millennia later, thus making His proclamation a falsehood?
When Christ made that proclamation circa AD 60/70, I do not believe that He was constrained by some mythical future event in 1844 of which He was unaware.