also stats on book reading are notoriously cooked, look at how many books publishers claim the median American reads.
To put it plainly, this attitude is probably the main reason reading books is sometimes labelled as an elitist poser passtime.
Kids will enjoy reading books that are genuinely good, but they need to care about the subject in the first place and they'll come for more on their own term. Focusing on the numbers ("X books per months") or denigrating the other things they also enjoy solely based on the format will just signal no shit is given about the actual content.
Trying to give grades to kids for Oscar Wilde's work is fully against the spirit of his thinking. Trying to grade kids for a whole lot of modern "classics" also goes against the spirit of their thinking. Joyce was too busy writing horny smut to be a supporter of literary analysis of his work.
But more seriously, most young adult fiction is pretty low quality. I cringe pretty hard when I look back at what that genre had us reading at the time. Percy Jackson and Eoin Colfer are poster children for the millennial brain rot that ended our collective love of YAF. We are a far cry from the high point it hit under the excellent writing of a certain Brian Jacques
Joyce's penchant for scatology in no way diminishes his canon's suitability for engagement via critical theory. If anything, the poststructuralist interdisciplinary approach is as natural a bedfellow for the interpretation of Ulysses of Finnegan's Wake as one could hope for.
To demean Eoin Colfer is another interesting hill to die on (Darren Shan?). Benny and Omar is a fantastic debut novel and a great introduction to class and cultural distinctions in the Islamic world as viewed through the eyes of a surly western teenager. The Artemis Fowl debut as well is a perfectly inoffensive fresh IP with an interesting take on putting a cyberpunk spin on Irish Mythology - although marred somewhat by an appalling cinematic adaptation.
To then cite Brian Jacques as a high-point, ploughing a furrow as he does in the foothills of mid-brow K-12 readership, only suggests to me somebody completely unfamiliar with the canons of Terry Pratchett or Philip Pullman. In any case, you seem to be conflating Young Adult Fantasy with the rich and well populated canon of Young Adult Fiction.
Properly defining how we educate children is tough.