My son never used a babysitter. He was raised by both his mother and me at home 24/7 (she didn't work, I worked from home).
He is hardly dependent on us. More on his grandparents because they spoil him, but the first 4/5 years of his life, he would see them only a few times a year.
You don't need to justify working full time, or your wife/husband doing the same, but there is no way childcare in a nursery/pre school is as good as stay at home parents (assuming normal parents of course).
Heck, it is common for kids that are put in nurseries when very young, to develop very very strong bonds with the caretakers, sometimes more than with the parents. (source: studied/worked as one)