Bullshit.
The push for vegan goes hand-in-hand with the push for chicken. No red meat. Red meat has things your body needs in it that you can't get from plants or chicken. Enzymes to help your brain function properly.
Just like we're all iodine-deficient, all of us. On purpose. So that when the thyroid needs iodine it fills itself with flouride and bromide. You're much more docile on the way to your slaughter.