I like Hitchcock's line..."I don't make slices of life I make slices of cake"
Yeah. If movies and novel were perfectly logical, who'd want to see them? They'd be like life--long periods of stuff not very interesting to anyone except the person experiencing it. One of the most basic building blocks of movies--cutting from one point of view to another--isn't logical. People looking for logic in alien invasion movies probably serve vegetables instead of cake at a birthday party.