Despite being structurally ready for the real world, human infants are rather under-developed compared to most other mammals when they're born. No other species takes nearly a year before they gain full control over their balance.
Blurry baby vision
Newborns lack the voluntary muscle control that allows your eyes to focus on an object. It will take your newborn nearly three months to gain voluntary control over their vision. In other words, they won't be easily able to even see without effort.This only makes the world even more confusing and frustrating than it would otherwise be.
All human infants have an alarming lack of strength or mobility. For months, infants are unable to sit up or even reach and grasp a desired object. In a way, infants are pretty much trapped inside their own helpless confused bodies. No wonder all babies do is sleep and cry!
To top it all off, your sweet lil' sucker won't be able to properly hold up their own suddenly heavy bobble-head, as their neck muscles had little work to do when they were floating in amniotic fluid and being pressed upright by the snug muscular walls of your womb.