I feel like these films are on the rise because of internal fears within the Christian church of the rise of non church oriented faith, and non belief in general. In the face of the growing modern world, churches are injecting tons of money into these "keep the faith" type of venture to maintain retention. Remember the key of this movie is to "help" doubting young Christians who are on the fence. So you might think its preaching to the quire, but its preaching to the quire that's debating a move. Once they lose a christian its likely they will not only that person but all their offspring as well because once you realize its all bollix, you certainly are going to tell you kids and their kids that too who will then realize its all bollix or will be too busy enjoying life to bother even knowing what a church is (my kids).