You can’t view this in a vacuum. You can’t purely compare children of divorced homes vs children of married parents.How is the marriage? What messages are they showing the kids? You need to ask is it better for the child to have separated parents vs having the child live in the home with the rocky Shalom Bayis. There are no easy answers and one size does not fit all.
I will agree with you about children of divorced parents being more likely to get divorced themselves. But I’m not sure exactly how to quantify “more likely”