Nope

Not to be an ass, but we're actually designed to eat raw things...carrion (D3 Gold), veggies, nuts and fruit mostly. The morphology of the teeth, hand, and digestive tract all let us know this... Unfortunately(from an evolutionary, not culinary perspective), due to moving away from this type of diet and not eating it from an early age, as well as evolutionary adaptations of pathogens, it's not a feasible diet... Fire is a realitively recent technology, compared to our morphological adaptations...

I believe you are thinking of the appendix being realitively useless. All these really lets us know is that in the very distant past we were much more dependant on high fiber type vegitation...

Also, some types of Kale are better eaten raw than others. Tuscan kale, Russian Black, and a few other varieties come to mind.