You're not gripping reality here. It always helps. Using less water means we have water for longer. Running at a deficit of 10% vs 5% would make an enormous di

You're not gripping reality here. It always helps. Using less water means we have water for longer. Running at a deficit of 10% vs 5% would make an enormous difference. It would extend the water we have now as we identify ways to mitigate the problem. If it's wasted water it's wasted water. That "slight difference" could be 20 extra years. A drought could end in that time frame. That 100 calories saved could mean 20 lbs, the difference between getting a back surgery or not because it's too dangerous at weights above X (this is real, btw.) It matters. Even if it doesn't seem like it to you.