Yes it is a scientific theory (not a hypothesis), which means it is the widely accepted explanation by scientists.
You're right that the theory is not about God, but explains the origins of the universe. What I said about God is what I think is a logical conclusion. If something has a beginning, then it must have been kickstarted somehow. What kickstarted it is by definition its creator. And this applies to our universe, in my opinion.
This does not reveal the nature of the creator or anything about them. It is merely a statement that they must exist. An effect must have a cause.
I apologize for sounding pretentious earlier, that was not my intention, but I can see how it came off as such. And apologize for misunderstanding your intentions as well.
Also I notice you have some downvotes. Just want to clarify that it is not me.