While agnostics assert themselves to be neutral upon whether or not God (or gods) exist, they typically also add that they think the question of God is unknowable and generally appear unconcerned over the fact that they have no answer for how the universe could otherwise exist.
Here, Dr. William Lane Craig explains how the very existence of the universe, and what we know about its beginning with the Big Bang event, presents agnostics irrefutable points that the universe not only needed an intelligent Beginner, but that its origin and specific components show us that an intelligent Creator MUST exist, per the necessary attributes for the first Cause!
https://www.youtube.com/watch?v=BGMwWQO_NzY&t=26s