> Maybe let's not get ahead of ourselves... sugar when consumed in moderation and with enough fiber/etc. is not really an issue

Yes, but addictiveness is the issue. In my personal experience, light drugs have comparatively low addictiveness (compared to "drugs-non-drugs" like nicotine and alcohol), while sugar (/junk food) has a much higher one.

If I happen to consume more than usual, I find sugar (/junk food) really hard to cut, but not light drugs.

Keep in mind that a vast majority of Americans are overweight or obese. Under the addictiveness angle, one can say that the majority of the American population has an addiction, and it's to junk food, more than light drugs.