Ok, but what if there is some case or model that scientists haven't considered?
But as evidence-based thinkers, we do need to work with the knowledge that we have, and not rely too heavily on a future discovery that hasn't happened yet. And if work with what we know, we do need to at least consider the God hypothesis as a reasonable alternative.
Perhaps the core of this question is coming from a different objection, though. It might be coming from the idea that God is just a convenient plug - to plug up the gaps in our scientific knowledge, and so we just need to wait for science to eventually solve this problem.
But that is a different topic, so if you're interested, you can follow this link to the whole issue of God of the Gaps: Isn’t God just a god of the gaps to fill what science hasn’t figured out yet?