Why do some Royals think they are qualified to write children's books?
I understand their reasoning. You don't have to write too many words, the story can be simple and as long as you commission someone good to illustrate it, the book could look appealing. Add on your royal connection and you should have a best seller.
Prince Charles wrote "The Old Man of Lochnagar" based on stories that he told his younger brothers. By all accounts it is an amusing tale. Sarah Furguson has also written a few books which are apparently passable.
Now, the Duchess of Sussex has thrown her hat into the ring with "The Bench".
In my opinion, it takes just as much or even more skill to write for children as it does for adults. Many have tried and failed.
There are some really good books written for children some of which have stood the test of time and are now being read to grandchildren and possibly even great grandchildren.
Among my favourites from my youth are "Wind in the Willows" and "Treasure Island". I also enjoyed The Famous Five and Biggles books. Among those that I enjoyed with my own children are "The Tiger That Came To Tea", "The Hungry Caterpillar" and almost anything written by Roald Dahl.
I haven't read "The Bench" but from comments already made, it is not destined to be a classic. No doubt it will make the Duchess a lot of money at the expense of those who will buy it out of curiosity.