Why can't Apple turn the iPhone's camera 90 degrees?

I'm getting really tired of watching and then trying to make decent looking DVDs of the tall, thin videos friends have taken with their iPhones. I'm our group's go-to person for turning photos and videos into playable DVDs. It was great when everyone used their cameras and produced videos that were horizontal - like they're supposed to be. Now, half of us have iPhones and are making vertically oriented videos. Yes, I know they could just turn the iPhone but it's easier to hold it upright by the short side than sideways by the long side. Bad habits are hard to break.

If thats the case, ditch iPhone camera and go back to the ol' horizontal cameras

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