I'm not sure about humor -- I can just see those scientists sitting around arguing with each other, hotly debating and each convinced
their theory is right.
Yes, of course Josef has everything under control. He says this is part of their "hide in plain sight" plan.

He finds it all amusing. He says they also use disinformation to their advantage.
But it's nice to know we're in good company when we debate issues of vampire physiology. Do you think those guys have forgotten about the fact that species' evolve in ways that help ensure their survival? I'm sure it's true that vampires would quickly deplete their food supply as suggested if they had to always kill their meals... but nature made the act of feeding a pleasurable one for humans, thus ensuring plenty of willing meals that they wouldn't have to kill.
Maybe that's the scientific discipline missing. That's the danger or specializing, if each branch of science only focuses on itself and doesn't see the bigger picture.