There is no physiological requirement for dietary carbohydrates. There is a requirement for glucose, but your body can create it from non-carbohydrate sources including the acetone produced by ketones. https://en.m.wikipedia.org/wiki/Gluconeogenesis
While you seem to be arguing against a strawman that the existence of glucose in our metabolic systems is unnatural, thus sugar is addictive? I think your counter points are a tad tangential compared to the actual points made by the parent comment.
Even though both are found separately in nature, it doesn't necessarily follow that their combination is just fine, especially in the volumes consumed in a typical Western diet.
If sugar isn't addictive at all, why do so many people have cravings for sweets? Cravings are a major hallmark of addiction.
At cell level this is just what we do.
We can talk about if this sugar has pesticides or other substances mixed with it in the post process that are toxic, but this trend of people saying that glucose is addictive is ludicrous. Unlike real drugs, we really need it to live. Would you trust somebody saying that oxygen is a drug and people should stop consuming it?