So you're saying that a caotic universe like our have less chances to occur by itself than a sentient all-powerful being. That needs MUCH more faith in my opinion. The "impossibly astronomical odds" are a myth. These odds are rare in our universe, but before our universe started existing we really don't know if these odds were high or low. And since our universe exists, we can easily say that it's existence is not impossible. As for the theist definition you're right, still, without convincing proofs that a creator exist, why should one believe in it?