If women aren't breastfeeding, why do they need so long to bond with baby? Are women less able to bond than men by this rationale, that they need that time.
(Yes, this is somewhat devil's advocate)
I know baby needs mum arguments, especially in the fourth trimester, sure. But that doesn't undermine the need and desire for dad to bond too. it's been shown that involved fathers (and adoptive parents) can have the same hormonal shifts (oxytocin, prolactin) as birthing women which produce increased attentiveness, bonding etc etc.