Cameron, this may well be my favorite Medium piece about writing. The loose dog metaphor is genius. All the articles about treating writing as a job — scheduled, regimented, clocked — feel disingenuous. Writing isn’t accounting. I know because I do both. As you said, writing is a loose dog, galloping down alleyways and through parks, jumping fences and ditches, splashing in mud puddles and swimming in lakes.
On an aside, walking my dogs is always inspirational. When they are begging to walk and I am deeply focused on writing, I know that is when I need to walk — not only for them but for me. They know when I need break even when I don’t.