> And it's exactly the same with smartphones: you assume it's a first-order effect through circumstancial observations, but I'd argue that's just your personal bias, and we have no effective tools to split the different.
Incorrect, we have many self-reports from direct interventions of people leaving social media and reporting drastic improvements in mental health. We also see in the data, temporal correlations from the onset of poorer mental health after people receive cell phones and join social media.
> There's just so many other things, including the technical evolutions that allowed smartphones to get popular in the first place, the social changes that also happen as we get a more global society etc.
What other things are simultaneously global/cross-cultural and affect genders differently?
> And I also see a difference between saying "it's the smarphones!" and "it's social media!" (getting rid of smartphones doesn't delete social media)
It's both. The effects are clearly synergistic. Phones are a constant distraction and engaging on their own, which could lead to sleep loss and less direct social engagement, and social media itself is also toxic in numerous ways, and its constant presence by your side means constant preoccupation, and compounded with their algorithmic optimization to drive engagement, it's a recipe for poor mental health.
> You (and the author) seem to assume that because other people aren't coming up with random guesses that look convincing, your own random guess has suddently extra weight and validity.
Not extra weight and validity, it carries all the weight and validity that literally the only explanation for the current data should carry.
> and if it really was mainly the smartphones front and center, we'd have seen specific issues way before 2010, especially in SEA for instance.
Haidt has been very clear that smartphones + social media are the main drivers. Phones themselves might cause some issues but not enough to explain the trends, and social media alone might cause some issues but not enough to explain the trends if you're only logging in a couple of times a day from your desktop or laptop. Combined, they clearly augment each other.