When there is a recapitulation of a topic that was already discussed earlier, it would mean that this topic is critically essential to laying a strong foundation.
If I told you that it is more important to know the musical alphabets than to play scales regularly, would you believe that?
This is from my experience. All it takes is to be familiar with the musical alphabets, both in forward and reverse order. Learning Western music becomes a lot more easier and faster with knowing the musical alphabets.
In the meantime, for more information on the Lorien Method as taught by Duncan Lorien, please refer to: https://www.understandingofmusic.com