I think she probably does get "it"...whatever that is. She's coming from a differing perspective than a climber's is all. I am not going to defend her or her perspective, but I will say that the book really does no preaching, other than just the pure subject matter. She never says, "don't do it" or anything like that. It would have been very easy for her to do so, given her circumstances.
I just thought it was a really great book. I've read a bunch of mountaineering literature, and most of it is pretty verse-chorus-verse with a different author and different peaks. Very seldom (with the exception of Joe Simpson) does any author simply address the fact that climbing can be devastating to those left behind, and then try to reconcile a climber's desire to climb with their family lives and goals, etc.
It's funny that so many climbers spout off about her and her views, while they refuse to look at it from any other perspective than their own. I know I've certainly been that way, and being here on the board the last year or so, I've seen many similar attitudes.