To complicate this, the Eila Stele comes out and says what the original Listener gods were- spren, stone and wind (chapter 116 epigraph). Wind/honor is obvious, so you’d think there would be a stone/Cultivation correlation. Which feels weird since it’s usually associated with plants, and growing things... but then there are the million and one references to the strata in the rock, and the garnet running through Urithiru like blood. And the windbreaks in Kholinar and various other structures that seem purpose-built to protect people from storms.
I think Cultivation’s been growing all this rock, and if she has, the Shin connection to it might be more their historical respect for the stuff people were worshipping when they showed up.
This might relate in another way to whatever’s going on with Urithiru, because that third spren has to be called the “sibling” for a reason. The listeners/singers are the ones who have a gender that isn’t male or female.