Outlaw sugar? What about those of us that can use sugar on moderation? Sugar passports might be better - you have to get a physical from a doctor and if your BMI and biometrics are ok you can get a sugar passport allowing you to order soft drinks and purchase candy.
But I agree with you on your first point: there's nothing wrong with sugar in moderation. But it seems that it's just too hard to keep it in moderation for a lot of people. And that's understandable: high calorie, highly palatable foods are often packed with sugar and fat (hence "highly palatable") but don't contain enough fiber to fill you up and -more importantly- keep you full for a long time. So you're gonna be hungry again soon, despite having just consumed a shit load of calories.
It's too easy to consume more calories than you actually burn, especially since we hardly move anymore compared to previous generations. Our life style is sitting down.