Just because it is in xkcd doesn't make the argument valid, correct and smart.
A book doesn't give you access to the content produced by billions of people instantly, neither music, refined apps where people that earn more than six figures work daily to ensure you spend more and more time on them. Neither does a TV.
You realize that we went from mass illiteracy to over 50 percent in less than 200 years. From town criers to printed papers.
Candidly the current landscape is a drop in a long full bucket, printing press, papers, radio, film, television, music, the internet, video games all of these things were going to "destroy the children" and yet somehow we managed to survive.
You like all those before you a prognosticating our doom because the world is not the one you grew up in.
A book doesn't give you access to the content produced by billions of people instantly, neither music, refined apps where people that earn more than six figures work daily to ensure you spend more and more time on them. Neither does a TV.
They are not the same.