Because if there's an opportunity, no matter how small, to bitch at something, people will do so.
It's one thing to create/throw already-established characters in a story of some kind. It's another thing to develop those characters, regardless of the situation they're in.
The window through which we perceive life is what defines our experience of it. We are only aware of a small fraction of what our senses pick up. We can all choose how we see the world.