Perhaps it's that I wanted to try out Survival's systems without trudging through any story encounters.
Perhaps it's that my flat is a gigantic Dutch oven right now. Does the swallow question why it flies south in winter, or the salmon why it must hurl itself against the rapids? All I know is that on firing up a new save, I felt the call of the ocean in my marrow. Why did I decide to walk all the way to the sea in one evening while playing Fallout 4's new Survival Mode? I don't know.