Earlier quoted context omitted.
But note that all those statement are about the amount of harm in an environment where alcohol is legal, cheaply available in every supermarket, widely advertized, and its consumption socially accepted, even expected . Can you really say in good conscience that other drugs wouldn't be worse if they became equally ubiquitous?
I think the crux here is that decriminalising/legalising the use of drugs such as heroin would not make them more widespread and ubiquitous. Despite being illegal they are still so very easy to access in almost all countries, and most people are well aware of the high risks associated with them. Legalising them would bring users/abusers into a more public sphere where it is far easier to access harm reduction and the…
access isn't the only issue. There is a high risk with obtaining and possessing an illegal drug.
plus there's no guarantee anything you obtain is safe (mixed with shit) or the correct strength, so there's further risk in putting it in your veins.