lol... exactly, no nutritional value. That's why they are always on the prowl, hoping to devour the weak, the injured, and the gullible unaware.
Their poison is so deadly, one bite and some victims immediately start squeaking and gibbering incoherently about hell, the end of the world, uh oh, Jesus is coming!, evil is everywhere, saying,"we are sinners". Then they surrender their children for sacrifice, and hand over their cash on a weekly basis for the rest of their lives in captivity as a demonstration of faith.
They are broken by trained personnel, get fitted with collar and chain by their master, and then go out searching high and low day and night to bring him more lives to devour for nothing more than a pat on the back.