To say that a writer's hold on reality is tenuous is an understatement-it's like saying the Titanic had a rough crossing. Writer's build their own realities, move into them and occasionally send letters home. The only difference between a writer and a crazy person is that a writer gets paid for it.
Fantasy isn't about escape; it's a survival mechanism. It's a way to deal with things that are so much bigger than you are. So I think fantasy is special, something to be cherished and protected because it's a very fragile thing and without it, we're so defenseless, we're paralyzed.