Actually you have everything to lose, as your lack of faith in the flying spagetti monster means you will spend eternity in torment.
By contrast, faith in the flying spagetti monster means you will spend eternity at the great bowl of pasta in the sky, with extra tasty meatballs provided to you magically.
After all you have to have faith in something, why not choose something that tastes good?
I don’t need the flying spaghetti monster. I have the Never-ending Pasta Bowl at Olive Garden.