But the harm is categorical. Cheap heroin might reduce the impact of crime/family issues, but what about the health of individuals? We'd be back to people wasting away in crack dens.

> Overdoses are prevented because they can happen in safe places where people will notice

what kind of places? If you become so addicted that overdose is likely, where would you be welcome? Making something illegal doesn't mean it automatically becomes socially acceptable; piss-stained street drunks don't attract lots of caretakers.

It feels like your assuming that people will be able to manage their addictions, and remain functional - I'm not sure this is realistic. Even mildly addictive substances can really wreck peoples ability to function.

Can you provide a source that suggests: "tobacco is more addictive [than heroin]"?