We find art that is fun and interesting and unexpected and it expands what we are. That's one of the purposes of art. Watching something predictable eventually gets your survival boredom instinct to kick in. Is this not a common experience?
[1] https://youtube.com/watch?v=Iwo4-wcodpM&pp=0gcJCXICo7VqN5tD
Some people do not like tragic endings while they love the premise of the movie. Some have issues where violence in movies could disturb them for days. So to be able to take a premise while toning down on violence and having a happy ending would be attractive for many people. There is a reason why many hollywood movies are variations of Americans saving world with a happy ending. Movies with tragic endings or challenging preconceived notions are not going to be successful.
In that sense, we would be able to make our own offbeat movies with intersting premises, instead of watching the usual movies prefered by average movie goers.