krene208 wrote "This is not about who has to go to work in the morning, it's about fulfilling the basic needs of a child. "

Yes, it is. If full-time working Dad loses his job due to poor performance from lack of sleep, the life-line of money for the family is in jeopardy. Mom can always nap later in the day. Dad can not.

Though, this is certainly not a question with breast-feeding, stay-at-home Moms. Dad has no milk supply. That is what Mothers are for.