Please have a baby and report back first-hand observations. Yes, they're far, far more sophisticated than most (all?) humans can comprehend, but they're also completely incapable for multiple months after birth. This isn't unexpected, human babies are born at what would still be mid-late gestation in almost any other mammal.

That quote about how "the only intuitive interface ever devised was the nipple"? Turns out there's still a fair bit of active training required all around to even get that going. There's no such thing as intuitive, only familiar.