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It's a pretty rediculous concept. The same arguement you made can be made for human diet as well. We, like all other mammal predators, have our eyes in front of our head for depth perception used in hunting, we have "canine" teeth for tearing flesh, and our ears are angled forward so we can pinpoint where sound is coming from (works kinda like visual depth perception).

Not to mention predators have large brains and tend to be much smarter than their prey given their high protien / high fat diets. Such diets are vital to brain development.