If we first assume God doesn’t exist, then God doesn’t explain anything.
But if we assume he does exist, then he explains everything.
To bring another example: let’s say you go out for a night to see a live band with your favorite companion. You’re not going to give much thought to the mechanism of how the music interacts with your body and your brain to produce pleasure. You’re going to be focused on the band members who are the agents of the performance.
And you’re not going to ponder the physical or psychological mechanism of how the company of your friend or spouse produces enjoyment for you. You’re simply going to enjoy that person’s company. The agent of companionship.
For the record—an agent is a person.
But if we assume he does exist, then he explains everything.
Neither assumption is helpful or explanatory. You're not explaining anything by assuming either way.
Even IF we assume a creator, and I ask you how something works, saying "God did it" explains nothing. Even if we use the favorite theist example of the watch, if I said ,"Hey, cool watch. How does it work?" If you kept saying "Timex made it", I'd say "I know, but how does it work?" "Timex made it." "I know, but how does it work." "Timex made it." "I know, but how does it work?" Ad infinitum.
"God did it" is not a useful observation or assumption in any sense. The assumptions are irrelevant at best. I challenge you to provide any example which proves otherwise.