[vundercind]

> But nobody says "why do I have to read Frankenstein?"

They really do. Secondary school students famously often don’t “get” good books and think they’re awful and pointless, much as people who’ve not been exposed to a given anything-but-totally-non-challenging musical genre will often think its masterpieces are boring and/or bad.

[BeFlatXIII]

IMO, that's also due to a lack of life experience. The students don't "get" it b/c it's too alien for them to relate to. They can be taught to echo the correct answers, but it's later life experience that will enrich their knowledge if it was drilled deeply enough that they remember.