Despite remarkable technological advancements in upper-limb prosthetics, contemporary prosthetic hands struggle to become seamlessly integrated extensions of the human body, a phenomenon defined as embodiment paradox. While modern myoelectric prostheses exhibit impressive capabilities in laboratory conditions, their real-world adoption remains limited, with high abandonment rates and persistent user dissatisfaction. This paradox arises primarily from subtle yet critical mismatches in temporal precision, spatial congruence, cognitive efficiency, and emotional resonance, essential for authentic neurobiological embodiment. The chapter systematically analyzes these mismatches, grounded in neuroscientific evidence and rehabilitation psychology, highlighting why even sophisticated prosthetic devices often remain perceived as external tools rather than natural limbs. Emerging technologies such as neuromorphic processing, regenerative nerve interfaces, adaptive machine-learning algorithms, and biomimetic sensory skins are examined as promising pathways toward authentic prosthetic integration. Additionally, critical ethical considerations are addressed, including user autonomy, neural privacy, and equitable access, underscoring the broader societal implications of deeply embodied prosthetic technologies. Ultimately, transforming prosthetic hands from mere functional tools into true extensions of bodily self-awareness requires integrating rigorous neuroscientific standards with adaptive technologies and ethically responsible design principles. This multidisciplinary approach provides a roadmap toward prosthetic devices genuinely perceived as integral parts of the user’s bodily identity.