Substance abuse is pretty much universally understood to be wrong (including by the addicts themselves, but they lack the help to get out of it).

Social media usage on the other hand has been normalized and now humanity's social fabric is in the control of a few companies who are happy to rent it out to the highest bidder. This has obvious implications regarding democracy, surveillance, misinformation, etc.

From a society perspective, I'll take substance/alcohol abuse any day because it appears to be self-regulating at a level that while is higher than we'd like, is much lower than what it takes to destabilize society and democracy.