Also, your god vs. universe that started existing out of nothing (which isn't a thing) argument is a false dichotomy.
Also,
Fairies, however, don’t add anything to the discussion and can therefore be dismissed out of hand.
For a given proposition, I don't think it makes any sense to use "does it add anything to the discussion" as a criterion for dismissing it. The OP is asking about other claims of supernatural entities, which are simliar to gods at least in terms of their supernatural qualities. You don't just get to dismiss them. So, rephrasing the OP's question: given that you have the same amount of direct evidence for the existence of deities and unicorns, why do you believe in one but not the other?