The idea that the universe exists without God is every bit as much a hypothesis as is the idea that God created the universe.
If we see an ambiguous pattern on the beach that may be of human origin and may not be of human origin we can disagree about the likelihood of either possibility. One person may say, unless proven otherwise we should assume this pattern was made by a human. Another person may say no, unless proven otherwise we should assume this pattern was not made by a human.
Who is right? It doesn’t seem obvious that either position inherently deserves to be the default position. Much may depend on the exact appearance and details of the pattern observed.
I take this discussion to be about the existence of God in principle, not about the existence on any particular God