But babies get constantly corrected by their parents and other adults!

Even though some families in some cultures do sometimes correct the output that their children produce, there’s no indication that that results in children making fewer mistakes or reaching a higher level in the language in the long term. In addition to that:\n\nThere are whole cultures that don’t correct the speech of their children.\nEven the ones that do, parents don’t correct most mistakes if they can understand what the child said.\nThe feedback that parents give to their children is ambiguous. In most cases it’s not clear if they are correcting the child, or just asking for confirmation to make sure they understood correctly.