All of Cainite physiology is supernaturally driven, with vitae as the fuel and one's Generation the engine. While the mechanical effects of the Embrace raise a mortal to starting Kindred stats, the fluff seems easy enough to explain: the physiological limitations of mortal biology that hold back some things are discarded; think of how your jaw is technically strong enough to easily bite off your finger, but you'll never do it, or how you'll never actually use all of your strength because experience has taught you that the human body just doesn't like how that feels usually. Being somewhat dead...