People said that comic books and pulp novels were morally harmful and caused juvenile delinquency, which is indeed nonsense. However that has nothing to do with the quality and depth of the writing so your post is irrelevant.

People also said the pulp novels and comic books had no literary value. But, if the kids end up better readers, who cares?

Since then, people have suggested such things are a useful way to get kids interested in reading, because they've seen results.