Prism:

Humans are at the top of the food chain, therefore killing animals for food is just a part of life. However, the sick people in this world feel the need to torture animals and destory their whole life by cramming them in cages from the second their born to the second they are tortured to death.

By consuming animals, one get enough nutrition. Maybe, there are pills and injections that substitute the nutrition that we get from animals. But how long can we rely on artificial methods?

Yes, there is a contradiction, but, a reasonable one.