Nowadays, movie has become an important way for people to enjoy life. Children like to watch cartoon films like films made by Disney. Teenagers often watch some fantasy movies like Avatar. Old people may like to watch some films related to history such as Pearl Harbor. There are more and more different and creative themes which aim at attracting various needs of people. In my point, I totally disagree with the idea that only movies that can teaching us something about real life are worth watching.
Admittedly, I acknowledge that people can benefit from movies related to daily life. For example, the movie Forrest Gump included many history events. The role Forrest Gump just likes a common person around us, and he overcame all difficulties and finally attained his happy ending. Since this kind of movies are often adapted from real events, it can easily touch people's heart. However, there are also other sorts of movies which are worth watching.
Take cartoon films as the first instance. Cartoon films are popular among children. Although they usually contain many fictional characters, children still love them. These movies aim at entertaining people, so they usually create some characters which don't exist in the real world but have some interesting feature like long ears and colorful eyes. Children like to watch this kind of films due to its creative idea and joyful theme. They can be relaxed and feel happy by watching cartoon programs. Besides, since cartoon movies are commonly designed for children, the designers also aim at teaching children some ethic laws. Like the famous cartoon film Mickey Mouse, it can teach little children how to keep well with friends, how to be a good friend and so on. Despite the themes of cartoon films are far away from our real life, they are still worth watching.
Science fiction movies are also worth watching, since they allow us to think of new ideas. For instance, many movies imagine there are really ET exists, such as the movie E.T, which make people feel exciting. Because of the development of science and technology, it is not impossible that these things happen. So many scenarists fancy how things will go if these things really happen. For example, The Day After Tomorrow, it depicts the scenery when the earth is destroyed. After watching it, audiences will begin to consider what cause the bad end(tragedy是不是能好点?) and what we should do to avoid all these things. These movies not only broaden our mind, but also let us to think about something which may happen in the future.
To sum up, it is too absolute to claim only movies which teach us something about real life are worth watching. There are also other kinds of movies are equally worth watching.