Maybe RSB is increasing the mention of the 100 heavens because readers seem to default into buying into Fanimry?
Yeah I'm not really sure, but that's where my mind goes as well. And, a shame too, because it seems a lot of people skip over the WHCB sections - though that's their own fault and I shouldn't feel bad for them. However, I do wonder if anyone has read TUC's WHCB lol, since there are several things in it that gave me pause that haven't been brought up yet.
This is definitely along the lines of something I'd like to ask in the AMA, though its been brought up before - can the WHCB be taken as more accurate/truthful than most other sections of the book? Largely because there are a few other parts within them, TUC specifically though, that have strong implications if they can be taken as factual.
As another example, it explicitly states that Moenghus fled from Ishual, without implication that the other Dunyain were complicit. Nowhere else in the text is this distinction made, and its important.