Well actually...
My wife and I have been following a form of the paleo diet for 2 years now, with the exception that we eat fermented dairy (yogurt and cheese) whereas "strict" is dairy free. Combined we lost 130 pounds, both have more energy than we ever have, less joint pain, and are typically in better moods too.
Humans spent 2 million years transforming into what we are today, with only the last 10,000 or so involving agriculture. Then, consider the "advancements" of the last 50 years, what are the odds that the human digestive changed enough to deal with the dietary changes of the last 2% of that time to include agriculture, or the last .002% of that time?
I guess my point is, that your blanket statement is calling me a moron. And it seems your opinion may not be a fully informed one. There are entire books on this topic, some are good, some aren't. This dietary choice has worked for me and my wife. But it is not necessary for others.
If you feel the need to argue the point further, message me privately, as this is not intended to be another derailment.
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(edit: Yes, I drink beer. It is gluten free beer, no I don't consider that paleo either. My wife drinks cider.)