Litteraly thousands of years of lack of empirical evidence seems to tilt the scales....and not in your favor.<quoted text>
But that does not mean they don't exist.
Do you worship fairies, goblins and unicorns....if you don't, why not?
Why do you not use "Alice In Wonderland" as your holy book? Thousands upon thousands of deities have come and gone over the ages but thousands are still around. I believe in one less than you do.