The moral of the original book is that the tricks and tools are not a replacement for self control. It's humbling that a literal children's book can (re)teach us profound things. And to me, it's comforting to know that a child's fresh mind is infinitely better at things so many of us struggle with (e.g., a phoneless child isn't addicted to screens, a newborn can become a vegan as easily as an omnivore)