It's not that you're on your feet. It's where all that weight lands.
Every step you take, every hour you stand, your whole body drives its weight straight down through two small patches of your foot: the back of your heel and the ball, just behind your toes.
Two spots. Together no bigger than a bar coaster.
Cushioned socks pad the whole foot evenly. They spread the padding everywhere — which means it's thin exactly where the floor is hitting you hardest.