Why is it a sin to read for fun?

I have no opinion on either side of the "argument". Of course getting people to read is important but reading literary fiction is also important.
I know people that have read just one book over the summer. And that was forced reading. I, personally, have read around 10. I wish I could've read more but I couldn't find the time. Although these weren't classified as literary fiction, it still benefits me more than the kid that only read one book.
Reading literary fiction is boring. That's why no one chooses to read it but being forced to read it and do homework assignments on said book will increase comprehension.

Honestly, I have no idea what I'm saying. You can't really blog about this article because it gave you both sides and the arguments. What else do you want me to say?