Why do Christians make "God of the Gaps" arguments?

Christianity is very adept at positing false dichotomies. Pascal's Wager is one example of that. So too are "God of the Gaps" arguments. These occur when people insert "God" as the answer to any phenomenon for which we have yet to determine a definitive explanation. Even if such arguments were compelling -- they are not, by the way -- how do they get us any further than a Deistic concept of God? It is quite a stretch for someone to say, "The universe must have a Creator; therefore, it's got to be Jesus!" Why couldn't the Creator be Vishnu or Odin? Can Christians prove that the Creator isn't Vishnu or Odin? I won't hold my breath on that one.