"The simple fact is that the only ideal is the one that works best for the family involved - if you need and want to work do so"
If a parent WANTS to work but the only option they can find is a private nursery with a high staff turnover (as many do) then they have to accept that their baby is getting a shit deal.
But that's ok, because the parents are getting what they want, and the baby can't talk and express his or her feelings. 
And babies and small children are natural optimists. You see this in developing countries - really poor children with smiles all over their faces, because despite the fact their lives are a bit shit, they're children and they're natural optimists. They protest about situations they dislike at first, but then they knuckle down and get on with it.
There are lots of parents who want to work but don't because they feel that putting their child in a nursery isn't going to be a particularly nice experience for them. They figure that you're only a baby once, and that a baby being REALLY happy and content is worth the sacrifice of a few years of being skint and a bit frustrated.
Obviously if you can't pay the mortgage or have a reasonable quality of life without both of you working then so be it. Baby has to put up with whatever's chosen for them, good or shit.
And personally I don't care which parent cares for a child - I just think that it's best for a BABY to spend most of their time in the care of someone who LOVES THEM, or at least has a strong emotional attachment to them, and is prepared to stick around for a few years.