Maybe I wasn’t clear, but what I meant was that other movies don’t have the narrative inversion of dropping you into a situation and only explaining it after the fact. Almost all horror movies start with unsuspecting victims wandering into some Terrible Pre-Existing Evil. A shark in the water, a planet full of alien eggs, mutant cannibals in a nuclear test site, a world ended by a monkey virus, a haunted videotape, etc. This stuff will be explained only when the protanonists figure it out.
But in an action movie and a romance, you know what the pieces of the puzzle are early on: good guy, bad guy, McGuffin, set pieces. Boy, girl, misunderstanding, love scene. There’s the “what”. Now let’s watch the “how” play out.
Horror movies usually thrive on playing it closer to the vest. They keep you involved by starting with a bang and following up with the promise that you’re going to find out Something Cool and Scary and Terrible, only to renege because the writers aren’t good enough.
At least in a bad action movie or romance, you know early enough when you’re dealing with bad writers. They have to pony up pretty quick and they don’t get the luxury of hiding behind the Unexplained or the Supernatural.
-Tom