One thing I've noticed as a parent is that there's a very clear delineation between children's books written for the love of children, and children's books writ

One thing I've noticed as a parent is that there's a very clear delineation between children's books written for the love of children, and children's books written for a) $, b) as PR for the [often celebrity] author, and c) as political statement (or about a politicized situation/event). It's unfortunate there aren't universally acknowledged sub-genres of children's books, as there are for YA & adults. Every once in a while you'll stumble upon a gem, but almost universally the stories kids want to hear on repeat are simple, imaginative and relatable - just like Goodnight Moon.