You bring up minor details but from the link at the end of the article...”Ms Watson has reportedly sold her story to Rupert Murdoch’s News Limited for A$700,000 ($625,000).”
I don't consider the accomplishments of rich kids news worthy. Anyone with mega bucks can do anything.
Show me a kid that delivered newspapers, saved his/her money for two years, bought a $1200 sailboat and sailed around the world w/o electronics.... THAT is news worthy.
I would guess mum and dad dropped in on her in their sea plane occasionally, and would have been there had the weather turned bad. We will never know.