It wasn't the deaths. The song would have been for a woman for me. I've been alone and lonely all of my life. I'm closing in on 5 decades of feeling like this. I felt for Bill. I was envious of them as time passed. The depression came when I realized I probably will never have what they had. "It's better to have loved and lost, than to never have loved at all." I wouldn't know and most likely never will. Shroombie apocalypse or not.
I wasn't saddened by their choices at the end. I applaud their strength. Making that decision isn't easy.