I don't agree it's the simplest. Creationism is actually simpler and that's why it's appealing to so many people. To be clear, I don't support Creationism, I'm just counter arguing.

I suppose it may seem simpler because we tend to anthropomorphize god, so "god simply snapped his fingers and everything came into existence" angle doesn't sound too complicated.

But then you start asking questions like where did god come from and why did he do what he did and the simplicity starts to fall apart.

Really, the moment the words "there's an omnipotent being that..." are uttered, simplicity goes out of the window.