Not even Western Europe, especially Western Europe, has tried "decriminalizing drugs" yet. They might offer treatment as an alternative to incarceration for users, but they definitely don't allow police to ignore the problem (like we seem to do here in Seattle).

An addict who is now a criminal can be forced into treatment at least. An addict who can freely buy their drugs (because we aren't prosecuting dealers either) and do them on the street anywhere will just die faster (especially with fentanyl).