You will get by just fine without sugar in your diet. I didn’t say we should ban food, I said we should ban sugar. You’re struggling to show me why it’s so different from tobacco.
The only real differences are 1) everyone loves sugar, so they’ll make up a reason for the double standard and 2) public consumption doesn’t immediately hurt other people. But then I never said I was opposed to banning smoking in public so that’s actually irrelevant.