It is a best answer so far. It made testable predictions that came true. It explains a lot of funny things neatly. But there is slack in the particulars, and a better and completely different answer could always supplant it.
Discussion
That's precisely my point.
If you follow the scientific method, which has rendered the frameworks of evolution and big bang, which give a variety of specific answers, some more plausible than others and often in contradiction, the expectation is that eventually we will have a change of paradigm.
That's the exact opposite of "belief", "faith" and the whole religious mindset, which is immutable and absolute by definition.