Lots of thinkers throughout history have pointed this out (David Hume and Seneca are the first 2 that spring to mind, but I'm sure there are hundreds more). Our mind doesn't work correctly when it's constantly focused, and as much as we think scrolling is not focusing, it is. The part of your brain that lights up and pays attention is active when you're zooming through content. There's nothing wrong with it, but like everything the dose makes the poison. You have to take breaks and balance it against other mental modes.

One formulation I like is the Kethledge and Erwin definition of solitude. They say that solitude is not so much physical isolation as it is a lack of input from other minds. What electronic media do (among many other effects) is flood your consciousness with the presence of other minds. Even if that mind is deranged, anti-social, or even pleasant, your own thought gets crowded out. I'm a huge reader, and I realize even books do this, although less oppressively than electronic media, which is why I think people imagine them as antidotes to this problem. But I think maybe the most important thing is to take a rest and don't let anyone else talk to you for a time, either in person or via media.