That reminds me of another quote:
One of the things that most pains and torments these Japanese is that we teach them that the prison of hell is irrevocably shut. For they grieve over the fate of their departed children, of their parents and relatives; and they often show their grief by their tears. So they ask us if there is any hope….and I am obliged to answer that there is absolutely none. The grief at this affects and torments them wonderfully; they almost pine away with sorrow….I can hardly restrain my tears sometimes at seeing many so dear to my heart suffer such intense pain about a thing which is already done with and can never be undone.-- St. Francis Xavier, a Roman Catholic missionary to Japan, 1552
Now...if you are wrong the implications are staggering. You are attributing to God something He never set His mind to do. I've provided the reasons why I think that is the case that this is what has in fact happened.
I can see no reason at all except perhaps for some kind of correctional and remedial purpose.
That is my answer.