Atheists seem to say "there is no God", but the 'divine engineer' theory would say there is a God, just not one in the traditional sense.
Besides, we're been explaining anything inexplicable as the work of the gods for thousands of years. This conversation could have happened in Greek times and you would still have been convinced at the existence of Apollo at the end of it.
Imagine we were beings in an artifical life simulation, created by droodlewhoops. Maybe one day we would figure out that that's the case. Then we still don't know what droodlewhoops are, hence we don't know anything.
You are right that atheism is also a kind of belief, that is way these day it is more common for rational people to be agnostic.
The only question is: to the program, does it matter that you are god? Does it make any bit of a difference if it believes in you or not? Will the outcome change depending on that fact? Do you care if the program worships you? (unless you wrote a program to worship you)
Thus, I don't think God (if he exists) wants us to believe in him. (The same way, I don't care if a program or and ant worships or believes in me).
Well, if you program it to worry about that stuff then yes. If you don't, then no. My current program couldn't care less about me. I'm okay with that.