It goes back to a style of moviemaking I remember seeing as a child, in movies like The Man With The Golden Arm, which I think was shot all on a sound stage.
“Our battered suitcases were piled on the sidewalk again; we had longer ways to go. But no matter, the road is life.”
“It is also a good rule not to put overmuch confidence in the observational results that are put forward until they are confirmed by theory.”