Here's the main problem: When the movie industry chooses to make Transformers part 7 or Grown Ups part 5, they are essentially telling us (the audience) that those are the kinds of movies we as the audience want to see. It is kind of like how when a parent feeds a young child, they can choose to feed the kid McDonald's everyday or they can choose to feed the kid fruits and vegetables. Either way, the child is going to eat. And either way, people are going to go to the movies and buy tickets for what is showing. If the movie industry stopped making 75% of its commercial films be escapism aimed at kids/teenagers, people would still come out to the movies to see intelligent movies or those that are based on true stories. I do not believe that a movie like 12 Years a Slave or Captain Phillips has a "limited audience" because of its subject matter. I believe that the industry does not give those movies a chance to succeed, thus they rarely succeed. (Captain Phillips was a hit, and it was given a lot more screens than 12 Years a Slave). The industry underestimates the intelligence of the typical moviegoer, and feeds them McDonald's most of the time.