Good god man. Its not that I don't comprehend what you are saying, its that I can't believe you actually think that.
The whole point about fantasy is that it is not grounded in any type of reality. If what you were saying made any sense, then there would be no fantasy in the first place. The only limits on fantasy or fiction is the human imagination.
There is no such thing as unrealistic or realistic fantasy, theres just fantasy.
Hm I think you all should stop fighting over this. .. afterall we are talking about fantasy, and there everything is possible. 100 feet tall elves? Why not? Miniature dragons? Why not? Good looking ogres? Why not? ... of course there are standards for various things, but that doesnt mean that you cannot change it if you want.
"Training is principally an act of faith. The athlete must believe in its efficacy: he must believe that through training he will become fitter and stronger, that by constant repetition of the same movements he will become more skillful."