Even the best of the best in "Western Hemisphere" movies (say something like "Taxi Driver") are never stories you imagine could have really happened. So there may be great storytelling, acting, moviemaking and artistry, at the end of the day the experience is one of entertainment.
By contrast, a movie like "Lilya 4 ever", feels like it could have happened and offers you a glimpse into another world, opening and enriches the mind (somewhat like international travel).
True, but there are rare examples of Western film that do qualify. "Acts of Worship" comes to mind. It's an Indie film that rivals anything I have ever seen when it comes to sheer realism and social content.