Makes logical sense to me. A baby has nothing but its own genetically inherited model worldview to map its sensor input to. A model worldview that is primarily concerned with faces, treats, hunger and feelings. I takes many years to map these phenomena to a fuller model of the objective world. The brain and therefore the human consciousness cannot see the world as it is; the brain gets its information through sensory…
Lots of our reasoning is necessary for individual survival, but it's something we build up and learn from others over time, and it's something that is passed down through culture.
I would just imagine that being a baby or being on lsd is similar to no ways of chopping the world up, and no deep rooted ideas of the true nature of our experiences. I don't think you need drugs to get there or need to have/be a baby. I don't think it's much different than the purpose of attaining enlightenment, from the Buddhist perspective.