Totally agree that in current times food is an addiction. Since when do we need to eat 3 meals a day? At least 90 percent of modern humans history, we used hunting and gathering to survive. Only in the last 10 percent we have agriculture, and much much later, refrigerators, supermarkets and convenience stores. If we needed this much food our species wouldn't last a week before agriculture. Spoiler alert: we lasted 300,000 years.

Agreed - and it's been proven (citation needed) that a low calorie diet prolonges life.

But here we are, needing to consume more energy because we do things (good, bad, useless or wasteful) with our time (and these things aren't directly looking for food.)

Yes but it causes an immediate spike in blood glucose levels, which if unused, is stored as fat. That's what makes it dangerous - people generally seem to consume sugar when it is least needed, making it especially detrimental.

>drug: a medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body.

You basically made his point for him.