That makes sense- given the scarcity of the refrain, having it be pretty much a high-grade aircushion seems reasonable (i imagine the Fate reader doing their thing might get more mileage before they turn into cherry filling though)
Ignoring rivals/archetypes like the Warlock/Fate Reader (and depending on setting ofc, which may make this question moot), how in-character are the refrains (ex. Does the character know theyre altering reality when they say a given refrain).