Earlier quoted context omitted.
How did they manage it in the 30s (or whenever depending on your nationality)? Are you absolutely certain that criminalization wasn't an overreaction to a problem that after all wasn't all that big?
Short answer: They didn't. Back then lives were being ruined as well. And the availability and affordability of dangerous drugs has only increased since then. People just didn't make such a "fuss" of addiction, and especially in the case of poorer people, nobody really cared.
So why should we make a fuss out of it today?
>and especially in the case of poorer people, nobody really cared.
Whereas now they do?