The amount of services set up and accessible for each gender is not relevant to the point that talking about "male PND" takes the shift of focus away from women. It's possible to raise awareness and focus of mental health in general, without taking away the seriousness of PND. It's not about demanding women have all of the access to mental health services. I think we're on the same page here :)
the main reason male suicide rates are higher though is that men choose more lethal methods.
This is true. Three times as many women attempt suicide than men. Yet four times as many men die from suicide than women. Men tend to be more successful. I also suspect that women with dependent children, although they might suffer from PND, are less likely to commit suicide because of fears over who will take care of the children. The stats back this up - women with dependent children (with the exception of those suffering extreme PND or psychosis) are less likely to commit suicide than their child-free peers, whereas men with children have identical suicide rates to others in their age group. Likewise when you have family suicides, when initiated by a woman the evidence tends to point to her taking this drastic step because she fears that she cannot care for the children. Whereas when a man kills his children, it's more often DV related, to punish the children's mother, or out of a sense of "nobody else can have them, they are mine".
That leads me to think though that the children aren't having a magical protective happiness effect, but more that mothers struggle through depression and attempt to cope with feeling suicidal without actually doing anything about it, which must be a horrendous place to be.
Maybe they should rename it Post Birth Depression then men could be taken seriously too?
No. Because men don't experience birth. Which is the entire point. If you want a fluffy gender neutral name then call it new parenthood adjustment depression or whatever, (although that then leaves out parents of second children, children who die shortly after, before or during birth, parents whose babies are adopted etc etc, so postnatal would seem the most sensitive) but the entire point is that it is a totally different experience for men and women. That is how our culture is, and probably every culture in the world, because even going past culture, the experience would be different because the mother's experience is so much more physical. And everything duplodon said :)