It's not a deflection. It's a critical epistemological point.
I have no good reason to think that it is true. It appears to be just some fictional story from someone's imagination.
I'm not sure what you are looking for here. I'm not omniscient, so I can't just tell you through Awesome God Power that Middle-earth does not exist anywhere or anywhen.
Yes, you would need to consider what the best case for the reality of Lord of the Rings is, and see if the argument is successful. If it fails, that claim may be discarded.
Only intuitively? It isn't through intuition that I know what fiction is. I have direct experience with novels and authors. J.R.R. Tolkien certainly never claimed to be giving divine revelation. It is possible to look through his notes, as passed on by his son Christopher, to see earlier versions of some chapters of the novel, suggesting an evolution of creative effort.
While intuition can sometimes be correct, I don't see it as a magical power, like clairvoyance. It's just another mental power we have, similar to reason, but working more at an unconscious level.
Honestly, what you write above doesn't make any sense to me.
True, I don't. I am not scientistic. However, that doesn't mean that anything goes epistemologically.
eudaimonia,
Mark