That is a highly questionable statement. For walking that is intuitively not true; most animals can walk almost immediately after birth. It would be very strange if human brains were so different that we had to learn walking from scratch. Indeed we do not; one of the most important reasons we can't walk from birth is because the brain has not grown enough yet. It grows by itself and then provides foundations needed for walking. Of course there is also a component to walking that is a learned skill that is refined.

For reading, the same applies. Our brains are equipped with many of the foundational aspects required for reading, and we only _learn_ a part what is necessary for the skill of reading.

Unlike computer models, brains are no tabula rasa. So we don't need the same input as computer models to learn.