Where does chia, taken as the seeds, not as flour, fit into this discussion?
And we have teeth with which to mash and grind food and saliva which contains enzymes to start breaking down starches etc, whether we have smashed, ground, sliced or whatever before it reaches our mouths.
Are we saying that we should never have begun eating grains, or that to adapt we needed a digestive system that could maintain us a meat diet, a bit like the Inuit, as well as adapt to savanna where there may have been less meat etc.
And has it been the deliberate breeding of grain crops and fruit crops for commercial gain that has swung the pendulum around to the metabolic unfitness of the majority today ?