When a mother or father plays with their baby, holds, talks to them, and cuddles with them, the babies smile and react positively to that stimuli. It is not very often that I see babies in strollers facing the same direction as their parents, so they can not make facial contact, with smiles on their faces. They are lacking the interaction they so desperately need to survive and thrive developmentally. Never do you see other primates leave their young, assuming that if they touch them too much they will become spoiled. They are always in contact with another primate, gaining new experiences that enable them to grow and learn.
Baby wearing is the answer.
Choose a method, backpack, front carrier, or sling, they all allow for physical contact, without hindering the daily chores that need to be done. I choose the sling because of the versatility of being able to shove it in the diaper bag and the multiple positions it uses. There have been numerous studies done by a variety of anthropologists on baby wearing and other cultures. In these studies, they have measured the amount of contact each culture gives their babies and the results of that contact. They are encouraged to watch what their parents are doing.