I think that one of the reasons a person turns to
atheism in the first place is an inherent need for
rationale.
Religion can offer nothing in the way of absolute, objective proof. Those out there who
truly believe in their professed religion can feel the truth of it within them; absolute proof as far as they're concerned. An atheist feels no such assurance as to the nature of the universe and the existance of a supreme diety, and therefore subscribes to none.
Now, keep in mind, that
being an atheist does not necessarily make you a daring, original, freethinking genius. Even Albert Einstein has been quoted as saying, "
Mein Gott in Himmel!"
(My God in Heaven) If you want to be daring, original, and/or freethinking, you have to do that on your own.