But the reality is that it does not. A foal can walk within a few minutes of being born. In the wild, if he couldn't, he was eaten.
If you really want to see this in action then check out a baby elephant. They aren't born knowing how to control their trunks. So they are completely dependent on mother's milk for the first bit. But if you watch them they'll try. They'll eventually learn to grab a bunch of grass and then it will just sort of flop around looking for their mouth. What's happening is that the brain is firing motor neurons in a seemingly random fashion and learning what each patter does until it learns to control the trunk. It's actually kind of cute to watch the little guy trying in vain to put a bunch of grass in his mouth.