That story doesn’t work for people with depression who otherwise have very good lives.
I grew up in a stable household with a loving family and both parents present and supportive. I’ve never had financial hardship, either as a kid depending on my parents to provide or as an adult providing for myself and family. I did very well in school, had plenty of friends, never had enemies, never got bullied or even talked bad about in social circles (so far as I know…). I have no traumatic memories.
I could go on and on, but despite having a virtually perfect life on paper, I have always struggled with depression and suicidal ideation. It wasn’t until my wife sat down and forced me to talk to a psychiatrist and start medication that those problems actually largely went away.
In other words, I don’t think there’s a metaphorical “cow” that could have helped me. It’s annoying we don’t understand what causes depression or how antidepressants help, and their side effects suck. But for some of us, it’s literally life saving in a way nothing else has ever been.