It actually costs money to caption films. Clipping movies is easy, but placing subtitles on it is not. I know for a 30 minute film, it cost my company $22,500 to caption it. The UA logo is an easy 5-minute job, but typing word by word definitely does not take 5 minutes. Does that make sense? Also, have you tried reading the captioning on a tiny 9 inch screen that plops down from the ceiling on an Airbus?
Why don't we make them all plasmas so those with poor eyesight could also see the movie? Oh, what about those who are deaf and with poor eyesight? Let's cover the screen with text. Do you see where I'm getting at?