Really?
Huh, so I guess all the overweight people who live on bad food, or smoke large amounts, or drink large amounts of alcohol are just a figment of my imagination...
Now, I'm not saying we should ban 'junk' food, or smoking or even alcohol because yeah, people should be able to self moderate but, ya know, they don't..
Have you ever compared the price of junk food vs the price of healthy food? It's expensive to eat healthy. I'm sure they put corn in everything because it tastes so good. The government probably has nothing to do with any of that.
On smoking, it's already being banned in both public and private businesses all over the US and is taxed incredibly.
On alcohol, the drinking rate in the US is 4% lower than the 1970s and has been relatively stable for the recorded history of alcohol drinking in the US.
The answer is better education, not telling people what they can and cannot do.
It the government had a good track record of success when they are given more responsibility I might be inclined to side with you, but they don't.