> On average, heavy social media use (more than five hours per day) is associated with lower wellbeing. Heavy users are significantly more likely to report higher stress and depressive symptoms, and believe they are worse off than their parents, compared with non- or moderate users.

I like this framing of social media use in the same terms as drug use. There are significant risks to this activity that so many people are ambivalent toward. Depression is not a condition you want to have, and here's this activity that causes it (or at least significantly contributes to it). And yet, so many persist!

You quote correlation and then jump to causation. Any high quality evidence for causation that make you confident it's not depression that drives SM use (or something else entirely driving both)?