Why on earth do they include the word "ultra" when the definition is "literally any amount of any additive"?

Because the whole premise is being bike-shedded out of existence.

On paper, fruity pebbles and Cheerios are pretty similar. But the dyes, sugar, etc make it a very different product. Sorta how we pump sugar into yogurt, spray it on as a frosting and peddle it like it’s actual, healthy yogurt.

A great way to undermine the argument is to make the terminology and classification impossible.