Humanity's struggle never ends - no one will willingly become food. As a result, a group of mages will appear every few centuries to fight against the vampires. If they encounter a daring monarch, they will even form an army. Although this kind of resistance is always just scratching the surface, it also makes the vampires tired. Because they can't get rid of it completely-human beings are not only enemies to them, but also food.
Enemies can be completely eradicated, but food cannot be cut off.