Why Would God Hide?

[Smaug]

I don't really understand why a lot of believers insist on the omnipotent God. Of course logic is not something that rules in the world of religion, but the fallacies that follow seem to be rather obvious. Powerful beings are better in this regard. Their emotions and motives have more or less viable basis at least. But in case of an omnipotent being the creation tale and everything that follows start to look like a description of some weird 'experiment' held by an emotionally-unstable person.