From your post:
“...Kyong-hui was widely known to have suffered from severe alcohol addiction and depression.”
This sounds very much like someone suffering from bipolar disorder who has self medicated with alcohol over the years. Depression becomes unbearable in the 50’s and 60’s as alcohol becomes insufficient to trigger a “happy” mood swing. Manias and hypomanias become “dysphoric” instead of euphoric.
And, of course, bipolar disorder runs in families.
Depression and black rage becomes the norm and suicide the only out.
I think I am correct in this evaluation. I wish I thought otherwise. Such people are very, very far from rational. They are tired of living and not much afraid of dying.
I have met some bipolar folks, and they really have some outbursts. I figure it happens when they go from mania to depression. Am I right?