WDing after SP would have put her in a very difficult situation, after two WDs from GPs, healthy SP appearance, and the media hype to see her Olympic quest. It seems out of question however unprepared her LP might have been. If she had thought of WD because of unpreparedness, she would have WDen from the entire comp.
And you're right. For that reason, I wouldn't have recommended it. She did the right thing by showing up, doing a surprisingly good SP, and getting through the FS.