I agree with you.
I thought the death of a family member was the worst as it was the first I came to experience as a child but I've learned differently over time. There's so many factors that come into play I guess.
A downward spiral is often the result of loss be it friendship, job, death or anything else; it's something we all need to deal with though and I've worked towards having some tosols in the toolbox to deal with it when it comes along. That's not to say it's preventable though, it often isn't. It comes with being human.