Perspective is a point of view. This perspective definitely has no basis in hard science (as of today) but is not "nonsense". To decide whether to eat an animal or not is an ethical/moral question (unless the animal is poisonous). This model allows you to answer that question. Also models like this are quite common, for example - karma, meditation, etc.

And, this idea is in Western civilization too. Look at the origins of the phrase - "you are what you eat".