You made the exactly same false equivalence between gods and computer simulations. That was my point.
"We know simulations can exist, since we simulate things, so it stands to reason that since simulations exists on earth that it could exist somewhere else. Nothing about simulations conceptually requires anything that we don’t already have a scientific method for. "
Simulating entire world only requites different computational scale which we also know is possible because we keep improving our computational capabilities.