True, I'll cede you that technicality.

My main point is that it's virtually common sense nowadays that too much social media consumption is going to have a negative impact on mental health, similar to how it became common sense that smoking is bad. I don't think there's any point in conducting a study where you take a normal baseline person and then forcefeed them social media until they're depressed, as we're already seeing it play out in the real world with countless people. Similar to smokers getting lung cancer or heart disease at a higher rate than non-smokers.