But later on it definitely matters. I had this same struggle with my daughter when she was in middle school -- she got so many kudos for "reading so much" but the books were all filler. I tried many times to point out that books are just a medium and the content is key.
Well, as opposed to, say, watching TV (or the somehow even more mindless content that’s on YouTube), do you really disagree?
Perhaps a bit more fringe: I think a lot of light young adult fiction has the nutritional density of popcorn and any perceived inherent good in reading those books is likely a product of publishing industry propaganda campaigns. Scholastic Corporation, I am looking at you...
Can you convince me that any of those assertions is wrong? Pointing out that "YA fiction is literature" doesn't come anywhere close to refuting any of the above assertions.
Even in a for-kids/for-youth book collection, where we used to have Jack London, Jules Vernes, James F. Cooper, Alexandre Dumas and so on mixed with more specific children's literature; I looked at the current catalogue the other day: such authors have been erased, and the whole offer is now made of novelisations of Star Wars, novelisations of cartoons and novelisations of comics... Oh you can still find them in other collections, but those are a bit more, how to put it, distinguished/smart collections (and aimed at a bit older age); so that was quite a shock to browse the catalogue of the 'standard' kids collection.