[purplethinking]

Even though it's unknowable, science prefers simplicity. As scientist we should prefer the model of the world with the fewest number of assumptions. The existence of something is more complex than non-existence (which is the default). If we could explain the world without a god just as well as with one then there is no reason to go for the more complex theory. That is especially true in e.g. the Christian sense of god, which comes with a ton more assumptions.