If a kid is truly over their head with a book, it won’t be long until they get bored and quit, unless they’re just trying to impress someone and aren’t interested in the book itself.
Kids should be allowed to unlimited learning and curiosity, this spark you have as a child is very powerful if you let it happen and nurture it instead of trying to fit all students in an iron cast thinking that you know what’s best for them.
It begins with free speech, then you skip a few years and suddenly trans kids are scared for their lives. Speech affects people and has consequence, it is not something to take lightly.