RSBM In my experience, hiking and climbing [also called mountaineering] are two completely different sports. Sauvguardia can be reached by any hiker by following the established trail, whereas Maladeta has no trail and is only a climbing route, ie you ascend your choice of rock walls using ropes and other equipment.
"Important: all the routes of this mountain are only for mountaineers. The trekkers and hikers must [not] try this peak. The technical material is necessary (crampons and ice-axe in the glaciers and rope in the chimneys [along] with the experience in rock-climbing of [yourself and your] partners)
Maladeta, Pico de la : Climbing, Hiking & Mountaineering : SummitPost
All the topo maps and guidebooks would have made this clear, IMO.
Perhaps there was some way she could have accidentally blundered onto the glacier, not realizing what it was, but IMO she knew she was not a climber and wouldn't have attempted to climb this.