I'm more thinking that it is not the medium(as in screens). But the content. Which make it harmful. Social media even something like HN is tiny chunks of dopami

I'm more thinking that it is not the medium(as in screens). But the content. Which make it harmful. Social media even something like HN is tiny chunks of dopamine rushes. Same effect could be achieved by TV channel surfing or even by audio. Just have to split it up small enough. And why not even gambling like blackjack, craps or roulette? Many of work task done on screens are much longer like writing or editing document. Maybe something like iterative debugging or coding could also be partly harmful. Or chat messages...