The serious studies all show they indeed survive BUT the children are NOT just fine!
That is a fiction carried in the mind of a parent who would rather not bear any guilt over the divorce.
You are acting as if any child from a divorce is worse off. That is simply not true for a particular child.
It may or may not be a fiction. And guilt may or may not play a part in a parent believe his child is better off with a divorce.
Unless of course you just would like for any divorced person to carry perpetual guilt.