Krishna children were taught that in the spiritual world there were no parents only souls and hence this justified their being kept out of view from others cloistered in separate buildings and sheltered from the evil material world.
In truth I am a single mother. But I don't feel alone at all in parenting my daughter. Krishna has a whole other side of her family who loves her too. And so Krishna is parented by me but also by her grandmother and aunts and cousins and uncles and friends.