It is horrifying, to be sure. But it's not the baby wasp's fault that it was born in a house made of food, that also happened to be alive. And it's not the mother's fault that the only childcare option nature has given her is inside a living spider. It is horrifying, and yet the wasp is innocent- it is just doing what nature intended, in order to survive. Humans, on the other hand-- the worst humans are the most powerful, and everyone and everything they torture and kill could have been avoided. Humans are omnivores and can choose to eat food that hasn't been tortured. Humans do not need to wage war, or run prisons, or do any other terrible things. Humans can survive without those things, and yet some humans choose to, even though they have the choice not to and brain to understand why it's bad. That is why the worst humans are worse than parasites.