As much as I like a cold Coke (Coke >>> Pepsi :-) on a hot day, I also realize it's bad for me, and I'm drinking a lot more Spindrift these days. And despite the fact that I rarely drink more than say, 2 cans a day (i.e. I can generally control it), I would still vote to limit the amount of sugar in any beverage to like 1/10 that of Coke, just for general health reasons. Of course, then stores will probably see an uptick in sugar cube sales or something.. Gotta feed the addiction.
I don’t have an issue with people eating sugar, but it is not a necessary nutrient.
It just seems that you're arguing that without added, pure sugar in drinks/foods your body and brain would break down, but that would be factually incorrect*
*unless you're also suffering from some exceedingly rare genetic conditions affecting certain metabolic paths but it's unlikely you'd live to tell the story.