The point is clearly that you are causing other serious harms by doing so, unlike with the heroin example. You can’t tear kids away from a huge part of their social lives without serious consequences. Coordinated action means it’s not a choice between two terrible options.
Social media is not social anymore. The algorithmic feeds messed up almost all utility.
Facebook was a great platform for local communities and democracy but later turned into a threat to civilization more or less when they introduced the 'algo' 2010 something and wanted to get money for 'promoted posts'.
