“Snared” is a strong word.
I like to consider this a temporary setback, where Gorm wants to use the PCs to get out from an unfortunate complication.
In our game, Gorm’s focus is less on the politics of the world, and more on study, magic, etc.
And once the demon-stoat is removed? Well, then Gorm can concentrate on the things that are important to him.
… and, given that numerous powerful plague victims are beholden to him for their survival, this will be useful.