In this case, George makes you laugh. What I wrote is almost a verbatim quote. The example he always brings is spaceships making impressive sounds as they shoot around in the vacuum of space. However, I do not think realism means what you think it means. A world can have a sense of verisimilitude due to internal consistency and still be wholly unrealistic. To describe the SW universe as "realistic" requires an ironic unmitigated gall that few can carry off, and no sane individual would believe.
I didn`t mean to sound rude. Sorry if I did!
Yes, I am very much laughing of George in this context, as he has changed a lot of things. I agree with the space sound example though and it actually underlines what I said about a story universe has its own realism.
Realism is relative to the story and the universe it is presented in. I have a bachelor degree in animation, and story telling was a big part of that education.
Every story exists within its own universe that has its own logic and realism. This goes for anything from sitcoms like Friends to fantasy epics like Lord of the Rings.
Realism as a term in storytelling and the narrative is about not breaking the already established rules of the universe the story is being told in, not about being similar to the physical laws and rules of the real world.
Some stories exist in universes very similar to our own, others exist in universes that doesn`t resemble our real world at all and have very different laws and logic.
In Star Wars you can hear sounds in space and an asteroid belt is something quite different from in our universe, where the asteroids are too far apart to see, let alone crash into.
It doesn`t matter that it isn`t like that in our real universe, within the realism of the fictional universe that is Star Wars, this is how it is.