The thing to remember with Big Bang and science is that we're still not close (relativly) to get an explaination on what happened at time 0. And while there's certainly room for a god running Sim Universe, we're not at the point we can say what the odds is. To get closer you'll need to quantify gravity and that's what the theory of everything is about.

Or to upt it differently we're are not in the state where we can determine if the Big Bang makes as much sence as Decker's explosion or as lighting a lightbulb.