This paper argues against the claim that human-centered artificial intelligence (AI) centers on "human action and experience," arguing that AI can be viewed as a relationship between technology and humans, where artifacts perform human cognitive labor to varying degrees. This argument is supported by comparative analyses of the abacus and mental arithmetic, alarm clocks and human labor, cameras and vision, and toll factories and seamstresses. Using new definitions and analyses, it analyzes sociotechnical relationships as various types of displacement (detrimental), enhancement (beneficial), and/or replacement (neutral) of human cognitive labor. Ultimately, it argues that all AI involves human cognition, and that obscuring cognition hinders critical engagement, distorts cognitive science, and limits the ability to truly center humans in AI systems engineering. It concludes that demystifying AI requires confronting human intervention.