The world needs people who are more comfortable standing still. We keep the earth on it axis when everybody else is bouncing around.
If I waited to be in the mood to write, I'd barely have a chapbook of material to my name. Who would ever be in the mood to write? Do marathon runners get in the mood to run? Do teachers wake up with the urge to lecture? I don't know, but I doubt it. My guess is that it's the very act that is generative. The doing of the thing that makes possible the desire for it.