Earlier quoted context omitted.
Well, the irony is they really don't have better things to do and someday they'll regret not putting the time into such things when it was available to them. But you know the old saw -- youth is wasted on the young.
There were some required reading books that I enjoyed and learned from, and some that I still don't see the point of. On the other hand, some things that I did in my own time in high school laid the foundations for my career and current interests. I can't see that as completely wasted time.
So, it's not just if a book is good or not; it's also if it finds you at the right time. I don't just mean maturity; I also mean what big ideas are swirling around your head at the time.
For example, I read One Hundred Years of Solitude in HS and hated it. I read it again several years later, having mostly forgotten it, and I loved it, thought it was a masterpiece. I recently reread it, several years passing and having mostly forgotten it again, and I couldn't finish it, just didn't resonate the same way and moved too slowly to keep my attention.
If you try reading a classic and are still hating it after 50 pages or so, I recommend just putting down and trying again later in life. Of course, that doesn't work so well for required reading when a teacher wants everyone in the class to discuss the same book.