Sugar is not toxic in moderate amounts, it only becomes a problem in excess. Yes, the American diet has way too much sugar. But the food dyes are truly toxic, they have negative health effects in any amount and they provide no nutritional benefit whatsoever.
Many artificial sweeteners are arguably worse than sugar, even worse than high fructose corn syrup. If everyone followed my advice, use honey and real maple syrup, everyone would be healthier. But if my kids are going to eat cake, it's not the sugar I am concerned about, it's the other shit in there like dyes and gums and preservatives.
I worked on a project about 10 years ago for a major food and beverage manufacturer. What we did is blend soybean oil, guar and xanthum gums, non fat dry milk and water and then run it through a homogenizer. The project manager told me they had successfully lobbied the USDA to label this homogenized milk emulsion as "milk" on nutrition labels. So, when you buy pudding or anything with a milk based sauce from big food and beverage, even though the package says it contains milk, it is not what anyone would call milk. This is an example of the ultraprocessed food issue.
Know that RFK Jr is just getting started. You want to champion Biden eliminating Red Dye 3 in January, but criticize RFK Jr for not banning sugar, yet. This is a silly argument you are trying to make.