There's such a thing as too simple, though, and works cross that line when they become flat or just don't make sense. Star Wars, for instance, is not realistic in the slightest, but it follows its own internal rules that make sense (for the most part), so we grant it suspension of disbelief. But suspension of disbelief is limited: you can only push people so far before they say "that's ridiculous." And the flatter and emptier a story is, the less suspension of disbelief it gets. The Starbound story is pretty flat.