The trick isn’t in the meaning of the word “innate”, but in your definition of child and human. Children are not fully human at birth, their brains are entirely

The trick isn’t in the meaning of the word “innate”, but in your definition of child and human. Children are not fully human at birth, their brains are entirely undeveloped; so it’s perfectly valid to say humans have innate goodness, and children do not, because they are not yet entirely human.