This CBLDF material has absolutely no bearing on "literacy" itself and doesn't even claim to. All they claim is to advocate for how amazing and incredible "graphic novels" are; notably, without mentioning at any point the value of reading by itself. It's weird how much of this pamphlet seems devoted to applying the "values" of reading prose to the world of comics.
Pairing graphic and prose novels together can expand literary and
communication skills. Reading these dissimilar formats on related
topics helps kids discover how **prose and graphic novels can tell the
same story differently** while evaluating the pros and cons of each
For example, Marvel has a wonderful Oz series that parallels Frank
Baum’s The Wonderful Wizard of Oz.
Frankly, any Oz graphic novel and any Oz novel are fundamentally different things, with different purposes and audiences. All graphic literature has always piggybacked on the annoying "prestige" of being called "literature". This is just another example.
There's absolutely no link between the consumption of one art with the comsumption of another. Prose readers won't necessarily consume comics, just as classical music lovers won't necessarily love Kanye West. Teaching your kids to love comics will make them love and appreciate comics. Parents should lie to themselves, or be lied to by others. Frankly, your kids will love what you love. They mimic incessantly. If you are giving your kids long graphic novels in the hopes that it will transition them to prose somehow, that's weird.