There are boatloads of research that shows that children younger than 1 year really need contact with the mother ( even if adoptive ), breastfeeding, and simple body contact ( among other things ) are part of various processes, mostly related to hormones.
It is great selfishness to hurt a child by not allowing it intense and almost constant contact with the mother ( not the father )
Working is not fun, I don't work for power, fun, or greed, but because I need to, I have to feed the family while the mother is busy being mother.
We have no technology yet that allows for women to not be mothers.
Body contact is indeed important, but you are mistaken that it must always be with the mother. Parents can share every childraising activity except breastfeeding -- and it's not necessary that children be strictly breastfed.
It seems you have grown up believing that family is about sacrifice. I think this is sad. Having a family takes work, certainly, but it should be a joy, not a burden.
I cry foul. Massive numbers of mothers can't breast feed. And frankly, if its hard, don't bother. Give the child formula, be a happier person and the child will be better off for that alone. The pressure to breast feed is huge and considering that there are far bigger problems - why bother?
My wife couldn't breast feed for long and felt terrible for it and was under pressure from almost all corners to carry on. But once she stopped the child, her and me were happier. Do what suits without fear.
"So, when you have your 4 months old kid, you will stay at home to take care of it if your wife is rich enough for that?"