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Even Stephen Hawking, in a moment of honest revelation ("The End of Physics"), acknowledged that any so-called final theory in cosmology cannot be proven to be ultimately the case, or it could always be eclipsed by new information. Why?
Godel's theorem.
In fact, this theorem places an unassailable boundary on any non-trivial mathematical axiom, etc., like those involving cosmology.
Many insightful and quasi-ultimate theories are still possible, but Godel's theorem puts a limit on mathematics that honest mathematicians and physicists would be wise to acknowledge.
Of course, accepting the reality of Godel's theorem also brings back the idea of contingency involving the universe, and since this is a philosophical concept that brings up the possibility of something outside the universe responsible for its creation, such honesty is not expected to come from those intent on disproving such a creation.
For those who cannot handle the limitation imposed by Godel's theorem, the best thing to do is ignore it as if it, too, doesn't exist. The second best thing to do is to deny the application of the theorem that even Hawking admitted applies to theories of physics. The third best thing to do is to simply claim that the theorem itself is limited to minor applications that Hawking did not realize.
There are indeed many ways to put your heads into the sand when confronted with a reality you just don't like.
But more is to be gained by just a little bit of humility as all good scientists should have, especially when trying to come up with ultimate mathematical theories that will never be and can never be completely ultimate.
DH