Just because we do not have an answer, does not mean that you can make one up. Where is any shred of evidence whatsoever that a god is necessary, or involved if one even existed? Where?
Think of it this way. A bunch of humans standing around wondering where the heck we came from, and slowly peeling back the layers of complex information and facts about our universe, attempting to figure it all out. Simultaneously, someone invents the idea that there must be something out there that created it all, because - there just must be?
I truly have no idea how anyone can stand around and assume there must be a god in charge of creation just becasue there is no current explanation.