Yes, but a lot of the current drug epidemic stems from over-prescription of opiates like oxycontin. Another big factor is the absolute garbage availability of social services. If you're homeless, cold, and in pain, heroin is a great way to feel better for a while. Housing and healthcare would go a long way to keep people away from drugs.

Very few people say "you know, this weekend I think I'll take up smoking meth". There's usually something that puts them in a vulnerable position that makes it seem like a good idea.