It's a nutrient. This is an enumerable set of chemicals. Balancing nutrition is a different matter entirely.
> In the quantities we're all taking about, it's hard to say these "breakfasts" are positively contributing though.
I eat sugary cereals every morning, and it's about half my daily sugar consumption. I don't see any problem with it—I don't have diabetes, I have a healthy weight, etc. The idea that foods are somehow inherently bad because they're sugary is ridiculous. It's the eating habits that are unhealthy, not the food. Sugar isn't rat poison ffs.