That doesn't get you to God did it. It takes more argumentation than that.
You may be misunderstanding what I'm saying. Physics can't explain metaphysical necessity.
Suppose you believe time is curved, and that it is ontologically necessary (meaning it needs no cause).
Metaphysically, this means one of two things. Either you believe that contingent form can be ON, which you need to justify. Or you believe that curved time, whilst being a specific form, is not contingent, but is in fact is metaphysically necessary, meaning time could not have possibly had any other form, which also needs to be justified.
Both of these positions require metaphysical defences. The only way in which I could see science being relevant, is if you are arguing that curved time is metaphysically necessary, that you use science to show that existence is impossible without curved time, which is really the only way you can show a specific form of time to be metaphysically necessary.
This is also what I mean when I say atheists have a BoP, because everyone, whether they realise it or not, makes positive metaphysical assumptions, because it is impossible for a mp proposition to be negative.