One thing that such a disclosure would help me with (my T disclosed that she had to go away in the Winter because she'd had a pneumonia-related bad illness as a child and if she didn't go to a warm climate and caught so much as a cold, she could die!) is to see how my T is taking it in stride and "dealing" with it which gives me hope I can deal with my own stuff and also the knowledge that she's had similar losses to mine so knows "what she's talking about."