“We were passing just under the peak of Cima di Cece" is exactly where, on the 'wrong' side of the peak, you'd find descending air that even in a light breeze (at 9,000ft?) would easily defeat a loaded Warrior's weedy ability to outclimb it. And if, as she admits, she'd have clipped rocks if she'd tried to turn away she hadn't left herself an escape route.
In other words it seems all too likely she painted herself into a corner, the classic and most basic mountain flying error.