Toast indeed, but they know the risk and are game anyway. The whole journey is risky. It's a risky business.
I think the biggest problem with 'Gravity' is that
it does operate so close to reality, but it's still very much fiction. After all, it never happened (and it never will). The premise is complete fiction, as are several conditions which are critical to the story. Sure, it has the feel of reality, but that is at once its greatest strength and its critical weakness. Since it has such a realistic feel, the distortions of reality are more difficult to dismiss.
I don't know why I've posted so much about this film. It's not exactly one of my favorite movies. Perhaps, I enjoyed it as much as I did because my expectations were so low. The blurbs I saw on TV left me wondering how the heck they were going to make the movie last an hour and a half (and how it could possibly end with someone's survival). I was thinking in terms of reality instead of science fiction.