It's being "dealt with" for sure. I'm not sure the amount of inconvenience and needless suffering imposed is an improvement on anything. I've never abused drugs. Opiates after back pain, minor surgery or a root canal aren't a "gateway" to anything for the vast vast majority of people.
I don't know about recreational heroin, cocaine or meth. I'm going to err on the side of caution and suggest that they're probably something I don't want to see legalized.
OTOH it'd be nice if marijuana advocates would stop treating alcohol as if it's the worst substance known to man. Current DWI laws are not justified with science. Legalizing marijuana and criminalizing responsible consumption of alcohol is not progress. If everyone you know would probably be in jail were it not for the fact they haven't been caught, it's probably not a good law.
Sane pain management should be between you and your Dr. Ethical patient treatment should not be disincentivized because someone has a political agenda.