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Not necessarily. The point is that given the current environment, some people become obese and others do not. The difference between the two groups may be partly due to genetics.

And actually, we do talk about the genetic basis for opioid addiction. I recall one doctor suggesting that a small percentage of the population are born addicted to opioids from birth whereas most people will have greater difficulty developing opioid addiction.

"And actually, we do talk about the genetic basis for opioid addiction."

Plus, a major health issue with heroin is the shit product being sold. Attempts to restrict access makes it more dangerous to use.

You could fix it by changing the environment - limited food rations, enforced exercise, etc. But the cost to society would probably outweigh the benefits.

That would imply raising food prices specifically targeted at poorer people.