Even the other vampire girls that seem to have more loose morals didn't seem like the type that is super dangerous, not that i don't see other vampires being, but i feel that like any situation you don't judge all of one "demographic" by the action of a few, i mean even if half the vampire population in this story is dangerous i really doubt they could do any damage that humanity already does.
But i don't think it's bad that a hunter exists, in a way to achieve an equal footing in dealing with each other both parties need methods to deal with one another, be it fatal or not.
But let come back for the truly important thing, as always Nazuna is best girl.