I'm not sure we're disagreeing? I don't think LW has some kind of moral obligation to put up with her boyfriend being emotionally unavailable. She can leave, and better she do so than continue demanding something he is in no position to provide.

What I said is that I would not want to co-parent with someone who can't handle six months of emotional unavailability. Parenting asks a lot more of you.

As for gender: LW says her boyfriend was emotionally invested until the residency, including during med school, suggesting he does see emotional investment as his responsibility—when he has anything left over to invest.