Hermione isn't the first person that's he's met or dealt with such a stubborn streak, especially during all the illness/sickness going around.

There's no mistake in saying what he does. Even if Hermione isn't getting rest, at least she's staying by the fire, and laying down, relaxing. "Well it's mainly because we have spirit partners to help us with our spells, primarily healing. We can heal better and more efficiently because of them. So of course a group like the Inquisition will put that to use."