My entire life I have heard the advice to simply stay put if lost. Moving anymore just puts you farther off track. Even reading the linked article, I think I'd still just stay put.
This works if you know you're lost, know that someone will be looking for you and aren't too hard to find. Most people who are lost don't meet these criteria. Because she was an experienced hiker, I'm guessing they thought she was immobile (injury, heart attack, etc.) and this would mean she'd be in a place she would have gone if she wasn't lost.