it's role here is the same as relating the beginning of the universe. from an experimental standpoint it is completely possible that the universe started a few

it's role here is the same as relating the beginning of the universe. from an experimental standpoint it is completely possible that the universe started a few minutes ago or that the laws of physics changed in completely random ways, but we still want to study how the universe could have started given our current understanding of it. there is no reason why the big bang is a truer hypothesis than intelligent design/creationism for the beginning of the universe, but one of them can help us improve our understanding of our current universe the other does not. the situation is the same for the creation/evolution of life: assuming darwinism helps developing new drugs and intelligent design does not. personally I take it as: if an intelligent entity created of guided the universe it also carefully added the traces of an undesigned origin for us to study.