I'm not so sure, especially if you look at the sum societal impact, and not just the worst outcomes.

My personal take is that the net social impact is positive for alcohol, marijuana, hallucinogens, and maybe some of the party drugs. For most people, they tend to be a social lubricant, tool for exploration, and source of fun.

I think that smartphone use probably balances out negatively. I think for most people, they have a pretty severe negative impact on their lives, and for some, an extremely negative impact.

The worst outcomes for drug use are probably worse than those for smartphones, but not by too much in my opinion.