That's a fair point, but remember that the map is not the territory. We've come up with the semantic concept of "screen time" that bundles together a lot of di

That's a fair point, but remember that the map is not the territory. We've come up with the semantic concept of "screen time" that bundles together a lot of disparate activities, because it seems intuitively and linguistically compelling. But imagine an alternate universe where the equivalent term "screen time" also included origami for some reason. The study would reach almost exactly the same conclusions, because such a small fraction of people engage in origami relative to binge TV watching. That doesn't mean that origami is actually as unhealthy as binge TV watching. The map is not the territory.