About This Word, “Atheist”
I consider this a bad or false equivalency, at least as far as serious philosophical or theological arguments about the nature of god go.
I think that, for example "Santa" or the "Tooth Fairy" is more akin to something from one of Jung's Archetypes, which is a simplistic representational image.
However, most arguments about the nature of God are referring to something abstract; even during the medieval days of the church, the images of God were not said to be "God" himself, but images used to represent God.
So this would be the equivalent of dismissing the idea of alien life on the basis of equating it with belief in Marvin the Martian, or that a person speculating about alien life would assume it would actually look like Marvin the Martian.
This is why most arguments about beliefs in god and what they consisted of to begin with are archaic cultural myths; which falsely reduce it to belief in an simplistic graven image or stereotypical "fairy tale" written on a level for young children, when in reality the actual beliefs, texts, and speculations were much deeper thought and abstraction, contrary to popular myths on the subject and so forth, usually themselves based on ignorance or misinformation, or simple cultural myths about "religion" itself, what it is, and what it consists of, handed down in childhood themselves, not remotely historically, philosophically, or theologically accurate at all.
(Such as most of the nonsense, anti-intellectual cultural myths and fables about Francis Bacon's 17th century scientific method, and the development and overarching cultural significance of the various theories invented and contained within and thereof).