Well its like they said, for 200,000+ years humanity was out foraging berries and hunting gigantic beasts to survive out in the wild and now were expected to sit still and focus while being trapped in a gray cubicle with florescent lighting and a fake plant on a desk doing who knows what boring task 8 hours a day every day 5 days a week 50 weeks a year for 50 years. Out in the wilderness itd be useful to be the one in your tribe that finds new food sources and needs to be physically active and alert often later at night. But in a gray cubicle in some soulless office building? not so much