First of all, Levin, it's UNASSISTED... not unaided.
You are sadly naive to think that anyone with a few sailing lessons could undertake a voyage of this magnitude. The preparation alone would overwhelm the novice sailor.
Your final statement is insulting to this brave sailor, my friend, although I know you mean well, I just don't think you have a clue.
Unassisted means no physical help in the form of emergency repairs, docking, delivering supplies, etc. Someone taking your boat in tow would be giving assistance. Having someone motor out or air drop supplies would be giving assistance.
Getting hands on medical care would be assistance..... getting advice from an online physician would not. Do you thing Josh Slocum had a medical emergency manual on board? Probably.
Asking for weather information and suggesting a change in routing would not be considered assistance. Here you would be talking about information, advice, counsel, reference. Not the same thing as assistance. She still has to complete the actual sailing of the vessel completely on her own. She still decides what course to sail and whether she wants to avoid or take advantage of an approaching weather system. She still has to keep an eye on the horizon for obstacles, like floating containers or a submerged reef. Yeah...... it ain't easy when you stand all the watches.
What's wrong with your mom helping you pack the food? What's wrong with having a yard help you prepare your boat. What's wrong with a sponsor giving you a sat phone... which uses less power than an SSB radio? I call that good preparation.
Do you know that Mike Perham's dad tagged along behind him on a support boat when he became the youngest (age 14) to cross the Atlantic solo. Maybe that's questionable... but Jessica's voyage is definitely not.
It would be irresponsible for any sailor, no matter what age, to venture offshore without proper communications and safety gear. If she just took off without telling anyone.... well then you'd get the child welfare folks hammering down on the family. And besides, you'd be unable to document the voyage. So, whether you get your advice through SSB, SatCom, VHF, laptop or volumes of repair and emergency manuals, it should not make any difference. It's a matter of budget. All passagemaking sailors avail themselves of minimum safety gear... it's just that some can afford more that others.
SSB radios, EPIRB's, rented SatPhone's, Liferafts, watermakers etc. are all standard equipment on passagemaking yachts.
Remember... it's unassisted......... not unprepared!