And MommyJogger, I understand your point on looking out for children, but it's not like this child is neglected or suffering in any way. The baby is with grandparents and well looked after, even if it's not the mother doing it 24/7.
I think neglect and suffering each have huge sliding scales. Something can be neglectful without legally being neglect or even having a severe impact on the child. My child went into daycare at 6 weeks when I went back to work. I consider that neglectful on my part and I know that in many ways my child suffered for it, but it would certainly never be classed under traditional understandings of neglect and suffering. In like terms, I think that children who are frequently and unnecessarily left with non-parent caregivers out of parental convenience will likely suffer mild negative effects, even if that negative is something as simple as wanting mommy and not getting her. While I agree that multiple loving, adult caregivers is beneficial, I think we lose sight of the fact that this doesn't necessarily need to happen by making the mother inaccessible should the child desire the mother's touch, nor is it necessary at such a young age when really a very young newborn/infant unequivocally benefits more from care by a single, attached caregiver. It's a matter of how necessary the separation is and how much actual emotional benefit a parent receives from the outings.
I would hope that the parents in OP's post are suffering some kind of undisclosed emotional difficulties which make their actions exceptionally beneficial to the family, but I know that's not always the case. I think we must all know a family like that irl. Personally, when I read OP's post, my mind immediately went to another couple I know who took days off from work to attend a children's fair with their dogs and left their kids in daycare for those days so that they could more easily enjoy the day with their furbabies. The same couple also spent the week of their kids' birthdays on vacation overseas while their kids were passed around to various friends and relatives to be watched that week, with only a loose idea of who would have them and when ahead of time. I consider this neglectful even if it doesn't fit within the traditional idea of neglect.
I hope that made sense. I'm long winded most days, but late pregnancy isn't kind to my ability to string sentences together.
Besides, this is a semi-anonymous internet forum. I doubt that OP letting off a little rant here is going to do anything to the post's subject, so even if it were exceptionally judgey (and I don't think it was), it's not going to impact the woman in any way.