Responses

is it ultimately selfish? yes. but it isn't that simple. he abandoned her and his child for what he thought was better, and who knows what his mind was actually going through when it was basically being eaten alive.
he forgot her name for crying out loud, he'd rather be painted the bad guy for disappearing then let her suffer with him when she shouldn't have to (she also would've been caring for their kid along with him), nursing fatigue is real unfortunately.
I feel like it's pretty selfish of you to leave your partner without saying anything. Isn't that what being in a relationship is for? To support each other? But no instead he took that decision away from Hyeonji and she died thinking he abandoned her and I suppose he did do that.