There is no doubt that religion had already waned under the onslaught of the Enlightenment but it was Freud who provided the radically new understanding of human nature that made any religious explanation of the whats and whys of our personhood seem naive.
When a child comes in I believe that it's a 'multipersonhood ' and it knows it its consciousness knows it and it has a nuclei in the center of its consciousness that is the repository of all experience and all knowledge. And when you look in the eyes of your baby and you feel this sense that they are an old soul I believe indeed they are.
We might not make what athletes in other sports make but we have greater longevity and we do have certain freedoms to do things they can't do. Like stay home one week and play the next week.