Yes but humans kill creaturs that are not self-aware (or don't have the intelligence level of humans) for food, while vamps kill human level intelligent creatures for food.
An outside source was brought into this thread, UESPWiki. Not sure how accurate it is, but since another poster brought it up I will use it also. Based on that, vampires can fill their cravings with animal blood, also do vamps need to kill to feed or just drink blood, and do vamps even need blood at all in skyrim lore to stay "alive" (since drinking makes them weaker) what if a vampire resist the cravings?
Surely something cant be deemed evil because it is doing what it has to in order to survive. (If vamps even need blood to live based on elder scrolls lore or if it is simply a craving that can go unquenched)
And I didnt know the worth of a life was based on how smart a person or creature is.