I think most AVS members reviewing movies are un-loved, frustrated, wannabe movie directors that can't do, so they piss on any movie to show how smart and sophisticated they are.
The purpose of a movie is to sell tickets, and the means is to entertain you. That's all. It doesn't need to be original, sophisticated, elaborate, artsy-fartsy, or even clever. As a matter of fact, some very obvious films are very entertaining. All 22 James Bond films had essentially the same plot and all pretty much complied with the same formulaic mix of action, sex, gadgets, and violence. They were entertaining and in the end, only the Harry Potter series grossed more money.
By the way, a lot of films recognized by the Oscars or other awards are ultimately boring and lacking in entertainmemnt value.
Obviouslu NO the story only has to be minimally present, as long as the prospective viewer can distinguish the movie as an offering in the genre he favors. 3/4ths of what my wife views are Romance movies, the other quarter is mostly British detective stories. I like SF and Fantasy and War Films. A story is a nice bonus, but ulimately not required.