The drug that kills and ruins most lives on the planet is alcohol followed by food (diabetes). And the abuse of alcohol and food has the same root that drug abuse does: mental health and education.
And let's not even start talking about the damage of legal drugs (medicines) on society at all age tiers.
Sugar is both legal to possess and readily available at very low cost. No one needs to rob people to afford it.
Rats prefer both sucrose (table sugar) and saccharine (artificial sweetener) over cocaine: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1931610/
Here is a review article discussing in more detail relevant literature on evidence for/against sugar addiction: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5174153/ Certainly questions remain, but I think it's pretty clear sugar and cocaine are not actually in the same stratosphere here.
I imagine you must be a major supporter of strict gun control. Right?
Let's be honest, food (sugar) and alcohol are in a totally different league from hard drugs. They're not even relevant to the discussion here. We can do an experiment. I'll take 2 shots of alcohol every day, my friend will drink 3 sodas a day (100+g of sugar), and you can shoot up heroin every day. Let's see how we're all doing in a year.