Alcohol.
Lots and lots of people lean heavily on it and think that alcohol is the spice of their life. When, it contributes to so many problems than it’s so-called benefits. We tried, in America anyways, to outright ban alcohol. Problem was that the person who wanted it banned, was too extremist.
Like he didn’t think it all through and think just going for the jugular of the problem is what will work. When, it didn’t and just made people work around it until eventually the ban was dismantled.
So, since then, we’ve been putting up with drunk drivers, drunk disputes, drunk abusers and other issues. I still wish we could just slam our hands down at the desk and demand we sit to discuss in how to properly deal with this issue than people proclaiming that it’s not a problem.
Nearly every societal problem has a solution, but you need a medical / buddhist / marxist / approach (probably a lot of other disciplines / lenses use this approach too, those are just some ones that more or less follow this).
The only problems that aren’t solvable, are things that would break the laws of physics.
As for drugs / alcohol use, lemmygrad and hexbear have a lot of good threads on drug / alcohol use, and how to view it, and handle it collectively. The USA is probably the worst example of a country to look at for alleviating the societal ills brought about by alcohol and drug mis-use, so its good to look at how socialist countries have tackled it throughout history. If you can’t find a thread I’d recommend asking over there, because you’ll get a lot of good answers.