This is true, so very true.
Reading is good for you, almost always. As Faulkner once said, “Read, read, read. Read everything -- trash, classics, good and bad, and see how they do it.” Reading how to make and drink poison is somewhat good for you, because then you’ll know if you’re accidentally making or drinking poison. (Just make sure not to do the last part, where you drink the poison.)
In fact, the only childlike behavior possible when it comes to reading is deciding not to read something before you’ve even picked up the book to begin with. That is the only thing.