Lizardbrain knows shit that the forebrain doesn't. Babies act on instinct. And like, when you're in a bind? You can do it too. It'll be flailing and awkward, but you'll fight to keep your head above water. Forebrain needs to learn the fine tuning. To know where to put your arms and how to kick your legs and start doing all the fancy stuff professionals can do. Do it enough, and it becomes second nature, but it's not instinct.