You know Sageous I like you because in of one of my thread You had your own point of view. And that's cool.
Here I just wanted to tell that in no dictionary Theory means Fact. And like I showed it with this link Theory: Synonyms, Theory: Antonyms | Thesaurus.com
Belief, assumption, idea are close to the word theory. Fact is an opposite.

I don't know how the universe beginned.
You don't know it. (Think about it really, do you know it for sure? or you just believe what actual scientists say?)
Science have a theory, which is solid now in the present! It is not based on blind faith, but of some other facts, and observations...
but it remains a theory and not a certainty. Because interpretation can be different in the future.

So seriously people accept it. We don't know. We are not certain. KNOWING is not having a theory or assumptions.

Thank you very much lol.