It’s this moment:
This moment was a very late addition to the script. It was added because to illustrate how helpful Ian wants to be. Ian must help, it is bedrock in his personality. Ian wasn’t supposed to help the Log Children originally, but now that he has, it will impact them in ways that will affect the ending.
Without the Log Children, the Raven Council can only manipulate thought by suggestion. And the Ravens are tired of suggesting what they want.