R T:
I don't know why this "close cousin" of authentic anicca (so to speak) has been misunderstood in circles I've been part of...perhaps the fear of touching / questioning / improving traditional teaching styles.
Maybe that, a touch of the Mushroom Factor as Daniel calls it.
But frankly, suffering is unpleasant, we don't like it, that's the whole point - and when there are good excuses not to honestly stay with the suffering, that even seem to be quite in-line with received teachings, it really does take a lot of bloody-minded determination to still want to examine the suffering, and to debunk the excuses. It's well worth the effort, of course.
Cheers
Florian