There was a campaign in Brazil urging people to pee in the shower to save water.

https://youtu.be/xyJlUZWwkdM

That makes complete sense. If the point of a movie is to tell us a story, then it should be catered to be more exciting and engaging. Of course it also makes sense for someone to come up with a story that benefits on being told realistically, like a found footage kind of movie, in which OP’s suggestion makes sense.