Although I agree that visuals are the most important part of the movie, I don't think that there is any necessity to try to eliminate the importance of sound.

Although I agree that visuals are the most important part of the movie, I don't think that there is any necessity to try to eliminate the importance of sound. However, I think movies are indeed the best piece where "show, don't tell" works. There are some easy examples, like instead of writing the place and time on screen, introduce a short scene with some memorable monument, a newspaper, a dialogue causally mentioning the place. Make the scene time obvious. Rather than reflecting some internal dialogue explaining the protagonist's mood, use music and facial expressions.