The problem is, people are so defensive in here that they refuse to see that the best thing for a baby is to be with their mummy - not left overnight elsewhere. This applies to being in nursery. However much some people want to protest, nursery for hours upon end a day is not the right place for a baby.
I wasn't aware that had been proven conclusively, but even if it has it has to wieghed against other factors where the PC is availble round the clock, and suffers the consequences of that. Poverty being a known kicker for children.
Everything is relative. We cannot as individuals create prefection for our children. Becuase we are flawed humans leading lives plagued with issues beyond our control. All we can do is minimise the worst possible outcomes where we can, which sometimes means picking the lesser of 2 evils.
Precious few of us will ever be in a postiion to select "absolute best" for everything. Life doesn't allow for that. That doesn't mean high quality studies that point to better putcones are useless and to be avoided, becuase within the results we ooght to be able to do extention work to determine which specific facotors mitigate risk and evaluate on balance how much importance ought to be awared to them. For example, if a NR parent does not have overnight visits does this decimate the chances of the adult forming an attachment, does this impact the longevity and durability of the child/NR parent relationship, and if so what are the measurable downsides for that on both an indiviudal and population sized basis ?
Ditto the implcations for both women and children where women being placed at an econmic disadvantage by non working during early childhood creating a dependance and a power imbablace with their working co-parent.
If not placed in the context of the range of connected issues it is pretty meaningless and is reduced to a stick to hit people with because somebody feels they are right and wants to have a bit of a cherry pick in order to score points.