Engineers create aliens, aliens create humans, humans create androids, androids creates aliens, aliens creates dinosaurs, dinosaurs create humans.... on and on and on.
The bottom line is that the alien existed long before David. David just engineered a bootlegged copy of what ever it was the engineers worshiped. That's how I see this mess. I mean the look on David's face after seeing yet another one of his 'perfect' designs get it's ass handed to it by a hu-man. Even he knows he's a shit god.
btw there is no purpose to having so many options with the number of probable voters here.