I think you are forgeting that established physics are nowhere near to explaining everything in and about our universe so using god to explain what is unknown is not a realistic explanation for his existence. Let me remind you that 2000 years ago, when we didnt know much about how planets and stars exist we explained them with god, when science gave and adequate explanation god moved to explain other unknown things and so on and so on... God will always be present as long as we have things we dont know about so basically forever. God is created out of human tendency to explain or give meaning to everything,

It is what it is