What bothers me about those particular photos is the seeming lack of care/empathy/sympathy on the part of those commenting and the person that posted them. Just "I am sure this child is dead because of the flowers, position of the hands and feet and the photo surround" :(
some of those were heartbreaking, especially the young toddler and the slightly older child together.
I agree that the lack of "living" photos may be the reason for them and also because the Victorians had a huge obsesssion with death, they love melodrama around death (abstractly, when it happened to someone else) and I suspect that death wasnt "done" properly unless there was a photo involved :(