I wrote a few children's books when these tools first came out, but ultimately I decided against publishing them due to ethical concerns. I couldn't quite put my finger on it, but something felt dirty with the act of publishing and profiting off this work as my own.
That said, it was a very fun exercise and I look forward to the stories that are created in the future where the authors don't have the same hang up I did. Even if you don't publish, I would recommend going through the creation process at least once to familiarize yourself with how simple it actually is (tedious, but simple) to create this type of work.