This article have missed to cover about low fee newbies used to put to save cost on payments leading unconfirmed transaction for many hours. That will make them panic about bitcoin and they will start blaming bitcoin network for it and some may even opt out from the idea of using bitcoin again. 
Many wallets has automatic fee functionality. But nowadays even transaction backed by hefty fee (120 satoshi per byte or even more) can get stuck in the Mempool.That article was actually quite nice, covered some basic information pretty well. Definitely recommend for any bitcoin newbie.
Of course you can add another 10 basic rules and bitcoin tips, but it is still solid ground to start off your bitcoin journey.