Actually it does. What you wanted to say is that it doesn't give you the right to beat the game. And you would be right....and also completely irrelevant.
The point of the game is to provide entertainment to the subscribers so that they keep coming back every month. Creating a game where 90% of the content will forever be out of reach of 95% of the players is an idiotic business strategy. Rather make 90% of the game be within reach of everyone, and leave that last 10% (Heroic Modes, Final Brawler's guild, top end PVP matchmaking, Challenge modes) for those who are willing and able to work for it.
To use your movie analogy, if you are going to make a movie that only 1% of the audience understands or gets, expect your movie to flop. By all means, put in a few gems for the really astute viewers, but don't make the enjoyment of the movie dependent on someone having a PHd in nuclear physics.