I contest this, and the origin of life, needs something beyond observable science-indeed, we can never prove the exact origin of the universe. We can try, and accumulate evidence to support various theory's, but we can not prove it (or do you disagree?).
We certainly can't prove anything in regards to this question, with the evidence currently available to us.
Presumably, science should look for the best possible answer in such a scenrio, correct?
Correct. But it should not simply invent an answer in the absence of evidence (supernatural bearded guy), and then state that he is beyond the capacity to test. While that may be convenient, it is remarkably unsatisfying.