Remember most of what they see in there is forgotten, and that the Wise Ones go in there while they're very young, prior to beginning their WO training, when they do knot know the past of the Aiel or the role of the WO in shaping their future.

It's conceivable WO apprentices could be gradually lured to the Shadow by their mentor during their WO training, taught a Shadow perspective on all of that, prepared to face the test of the Columns and interpret it from that twisted perspective.

Being WO, having gone through both the rings and columns didn't stop the Shaido WO near Sevanna from being largely corrupted and having very twisted notions, rejecting the car'a'carn and so on. None of them seemed to have realized they doomed themselves and their clan going on that path. It would presumably be little different for some DF. A lot of people tend to interpret things according to their belief system, down to denying any evidence they're wrong.