[YuriNiyazov]

The nonbeliever is not exempt from having to answer those questions. The reason that Occam's razor is on the side of the nonbeliever is because the nonbeliever's answers to those questions are unrelated: on the standard humanist worldview, how the universe was created (stuff that we don't know anything about but we hope the LHC will tell us) has absolutely nothing to do with what moral choices one makes in life (utility maximization). In other words, those two answers are "simpler" because they are not linked as compared to an answer that links the two by saying "well, God is responsible for those".