This grieves me too, the "Well, show me the movie or it never happened."
Social media seems to have created an expectation that everything can be shared. And sometimes it cannot.
Not just because film of it is not available, or kept confidential.
It makes absolute sense for survivors to be reluctant to share details of what happened. I have read and seen some accounts that literally keep me awake at night. I don't share them on here because I wouldn't want others to feel similarly traumatized, and because I feel further traumatized by the "So what / Ah, but... / Never happened" responses.
I can't imagine the responsibility of clearly remembering what you saw of a loved one's horrific last moments/hours, and also knowing that sharing that information will devastate other people you care about and literally ruin their lives for ever. I'm not surprised there are suicides among the survivors.