I am trying to decide if you are being serious or sarcastic here. It's nice to have the option to buy plant based milks without sugar added to it. Some of us, shit people included don't care for the added sugar. It has nothing to do with the diet industry. Sure everything in moderation, but I can't fucking stand my drinks tasting sweet. I want my coffee black as satan's asshole, my tea bitter as a tumblrinas tears when an ally goes rogue,  and when I buy plant based milk there better be an option for no sugar added because I don't want to taste sugar in my morning bliss. I'll save that for my fruit to taste sweet. That said I've never seen a fatty buy the unsweetened stuff. Where I live it's usually super easy to get the unsweetened varieties because they are the last to sell out before restock.