Why don't I pay attention to cutscenes?

I think it's fair to say I'm someone who values story very highly in games. To experience an interactive narrative has always been a driving force behind my interest in the pursuit. Not exclusively so - I've loved Doom as much as the next person - but every time I finished it (and that was a lot of times) I would read that whole screen of text and feel a greater sense of validation than if it'd been final boss dead, credits. My favourite games ever are all wholly focused on their story, Planescape: Torment, The Longest Journey, Day Of The Tentacle, Thief: The Dark Project, all with story oozing out their ears. So why is it that every time I start a game with an extensive cutscene, I haven't the faintest idea what they're about?