We investigate the matter-antimatter asymmetry within the framework of quantum field theory in de Sitter spacetime. While conventional perspectives often attribute this asymmetry to dynamical mechanisms such as CP violation in the early Universe, our analysis proposes a novel kinematical origin. Our findings suggest that this asymmetry may be an observational anomaly, observable only by local observers with causal access to a specific segment of the Universe. This unconventional insight, while grounded in de Sitter cosmology (an idealized scenario for real-world cosmology), has the potential to challenge established perspectives and drive a paradigm shift in our understanding of the observed asymmetry in the distribution of matter and antimatter throughout the Universe.