I believe these women want to show who they are inside - that they are still young and beautiful even if they have aged. Sometimes, the woman seems to age as the pictures continue in order, showing how she has become the person she is now. Or, the beauty shot is the last one shown, as in - "this is me, too."
Sure, I wish I was as handsome as I was on my wedding day 25 years ago - and that I was as blissfully happy as I was that day. But, I can only be the person I am now and try to stay healthy and keep in shape as best I can, both physically and emotionally.