I've always sort of wondered about this too.
There is also the matter of scenes vs. sequels. In a scene a character works toward a goal. A sequel takes place after a scene and involves the character dealing with the consequences of that scene and deciding what their next plan of action will be. This leads into the next scene. At least, that is one way of looking at how scenes fit together, and sequels seem like they would allow for significantly less conflict.
I do wonder if the concept of a character struggling to achieve a goal in every scene is a bit too narrow of a requirement.