Earlier quoted context omitted.
Some parts of the world certainly did. Read Postman's "Amusing Ourselves to Death". He talks about how Midwestern farmboys would read while they ploughed fields, with one hand holding reins and the other holding an open book.
They were for the most part not reading fine literature, they were reading low quality trash fiction adventure stories while their wives read trash fiction romance novels. It was the Netflix/Youtube of it's day. Of course some people read "good" things or consume "high culture" but most people consume whatever the mass market media of their day is (hence why it's called "mass market").
The other difference is that Plato's Republic sits not too far away from 'The Crocodile Whisperer' in the book shop and library. YouTube and Netflix feeds on the other hand are tailored to what the user already watches and what they will most likely get them to click next, stuck in a loop never broken by serendipity.
The immediate availability of entertainment in the form of TV and movies on Netflix makes the idea of finding, picking up and reading a book less appetising and harder. The more someone reads (even if it is trash) the faster they can read and the wider their vocabulary becomes. This makes it easier for them to pick up more substantive books later on. Instead we see a generation of young people glued to their phones reading text written by their peers, watching the same trash they would read but without any of the benefits of reading.
The need for entertainment drove many young people to read in the past and that is a good thing!