You are right and I concede your point. I just wonder at what point does a product maker become irresponsible? Obviously a manufacturer is not directly at fault when someone misuses their product, and they also are only selling what the consumer wants, but what level of responsibility do manufacturers have to help the consumer make good choices? I disagree that Doritos are not physically addictive in any meaningful sense. Like all simple carbs, Doritos can and do create cravings. If you eat a small bag of Doritos every afternoon for a month then stop, you will experience fairly strong cravings. You will feel miserable if you don't get your sugar. Try it! I used to eat a big bowl of cereal every day, then I stopped because I realized I needed to lose weight. It worked, but I felt miserable for a few weeks, cutting out my daily sugar infusion. That doesn't mean that selling simple carbs is bad, but I would argue that Doritos are engineered to be as addictive as possible, and purposefully sold in portions that encourage overconsumption.

You mention that we would have to string up a whole bunch of brewers and winemakers, but we do currently. Brewers, winemakers, and cigarette companies are all heavily regulated and taxed because they have the potential to cause harm. Is Four Loko, which is designed for overconsumption, morally tenuous? Probably. Four Loko is on a different level than Doritos because the health effects are much worse, but the same principle applies. Clearly Doritos should not be illegal, but maybe they should be disincentivized, because...

We have an obesity epidemic. More people in this country are overweight than not overweight. It's becoming a national health crisis, and costing us a lot of money. Type 2 diabetes, renal failure, and the like are preventable.

I think this article sums up my feelings on the whole situation. We have a health problem, and the cheapest, tastiest products make the problem worse. https://medium.com/health-the-future/918b3d08f21f