My extreme eating plan is designed to manage autoimmune disease by healing the gut. Did I enjoy giving up nuts, tomatoes, eggs, seeds, and lots more? Nope, but my awful health issues gave me no other choice.
If eliminating gluten and processed foods from your world makes you poop better and your skin all glowy, go nuts. May neither a bagel nor a cupcake darken your gaping maw again. But let's not use evolution as an a reason to not eat a baguette with some brie.