The non-birthing partner can suffer from postpartum depression as well. I’m sorry your wife suffered from that too. And yes, impacts on the birthing partner’s body is very real, but again, the original commenter was speaking about roles in parenthood, which both partners can take the same responsibilities. If you don’t believe me about hormones to make the non-birthing partner lactate, let me help you with that.

That’s not what the person said. After a baby is born, what (besides breastfeeding) can the birthing partner do that the non-birthing partner can’t do? You can even give hormones to someone who didn’t give birth so they can lactate, so actually, there is no difference. The rest is just a societal construct of gender norms.