I believe a lot of people make such comments because they have no other way of dealing with the subject.
I knew an Army NCO who "laughed" as she described a man's death in Iraq when a rocket hit his portapotty. She had to handle the casualty report.
No doubt about that. But, there’s a difference b/t people in the midst of the trouble/shock and those who read it and then take the time to “write” about it.
Doctors often have a very dark/black sense of humor and I do too very often (it’s the Irish in me).