Who hasn't struggled in their life? Postpartum depression, as many other difficult experiences, is a common experience, and, in that sense, it's normal. It's just a normal life struggle among many others. I don't see it as an MH issue. I just don't understand why every difficult emotional experience has to be categorized as an "issue" and to be diagnosed, as if it was something abnormal. Life is hard in general and the fact that we can't always cope well with it doesn't necessarily mean that there is something wrong with us and that we have an "MH issue". It just means that a lot of things in this world are legitimately overwhelming and can lead to break downs of our system.

Of course, it depends on the experience. If the person disconnects from reality because of their emotional state and say gambles away their life savings, then I'd consider this an MH issue. The same would go for severe dissociation, psychosis, extreme borderline behaviors like suicidal threats and other extreme manifestations. Anything short of those extremes to me is a human suffering that is a usual part of life. That doesn't mean one should not try to alleviate it and to feel better. It just means that it's a regular human experience, that is there is nothing pathological about it. I guess, the concept of MH issues just sounds pathologizing to me, and I don't like to pathologize human experiences no matter how difficult they might be.