I really enjoyed this article. It seems I cannot escape contemplating death for long and this helped me gain perspective again.
I will say though with this section of the article that negative emotions are a part of the entire experience - which means unhappiness. Unhappiness and pain greatly transforms people when integrated properly. You're not meant to be happy or unhappy but you ought not stay stuck when there is a choice and I think that's probably closer to the point you were making.