Well, I had, pre-TUC advocated for the possibility that the Hundred do not really see the future, so much as they are capable of discerning the chains of cause and effect that dictate what would (should) happen going forward.
But, as Kellhus describes, the Ark, and so everything that issues forth from Golgotterath, is outside these chains. So, when they "read" any normal chain, everything seems fine. But self-moving souls, like Kellhus, or things outside the "natural" world (i.e. Inchoroi) lay outside these "natural" chains of events. The Hundred aren't aware of the apparatus of their seeing, in the same way that we aren't really all that aware in day to day life of how we see. We just do.
And, as Bakker talks about in that interview, when he had an issue with his eye, not only is there a loss of perception, but there is a lack of perception of the loss. In other words, even though the whole cannot be perceived, there is the illusion that it is. So, when Yatwer "sees" Kellhus dying, it's because that is how it is supposed to be. But there is more outside the Frame of what Yatwer can perceive.
Think for a moment about visible light spectrum. We only see what we can see. We have no inkling, perceptually, that there is more. In reality, Yatwer does know there is more to see, but she is still blind to exact limit of the seeing. And so she must take her view of the whole as the whole itself.
