I think the classic midwit response would be to say that in order to determine if this is negative from a longtermism perspective, we'd first have to prove that:
1. this level of preoccupation is a new and historically significant phenomenon
2. the time not spent on scrolling would be spent on something else more productive
Both seem plausible, but they also seem like a couple of those tricky conclusions that seem naturally right but would fall apart with some research. For example, I think it would be better if we all spent time at cafes instead, but it's hard to say that that would result in better societal outcomes.
1. this level of preoccupation is a new and historically significant phenomenon
2. the time not spent on scrolling would be spent on something else more productive
Both seem plausible, but they also seem like a couple of those tricky conclusions that seem naturally right but would fall apart with some research. For example, I think it would be better if we all spent time at cafes instead, but it's hard to say that that would result in better societal outcomes.