ratiocinator
Lightly seared on the reality grill.
That's an extremely blinkered view. What about multiple gods? What about other 'supernatural', non-god 'explanations'? Armies of supernatural pixies collaborating in a collective to build the universe? Your fantastical imagination seems very, very limited.The possibility that the universe and life happened without a God creator and designer and life giver is one of probably 3 possibilities. (God did it, this is God, this did itself).
They are also basically in different categories. Inventing a god (or gods, for that matter) doesn't actually answer any of the basic questions about why things exist and are the way they are. You've just shifted the question on to said god or gods. Why do they exist? Why not a different god (or gods) or none at all? Why choose one fantastical, evidence-free 'explanation', rather than another?
Given that existence itself - whether of god(s) or the universe - is unexplained, if you knew anything about probability you would know that the probability that the universe just happens to exist for no known reason, must be greater than that the universe and a creator god just happens to exist for no known reason. The conjunction (and) ensures that.
All that is before we get to the dodgy wording "this did itself"....