"I am willing to completely agree that the human being has physiologically adapted over time (the last 2.4m years as you say) to better consume meat. However, I believe that these changes are incomplete but that perhaps someday we will evolve to be able to consume meat like carnivors can but right now we cant. To my mind, the biggest limitation is how we eliminate. While the carnivor has the teeth to chew its meat to digestable sizes as we use tools to do this job, the carnivor also has short and wide intestines to easily eliminate waste which we do not. Yes I accept that man has adapted over time to be able to better consume meat but our transformation is incomplete."
I believe meat has been villified too much, relatively speaking, when so much of our troubles have ben shown due to unnatural food introduced relatively recent into the human diet - refined wheat products and the endless processed foods.
Can we consume meat? Yes, how well can we digest and tolerate it? That's another story. But better than most believe.
I do believe in the nourishing and curative powers of fruits, especially when fasting. To be able to subsist on just fruits alone? Could a diabetic? Another story. But possible and I am open to it and discovering through intelligent debate and research.