"Oh really, you don't know whether to use the macguffin to save the world or destroy it, because you're hung up on the question of pUrPosE iN a WoRlD oF SuFferInG? What are you, a fucking 19th century aristocrat who thinks tuberculosis is cool and sexy because you've literally never had to struggle for anything ever and your brain has liquefied and run out of your ears as a result? Get the fuck over yourself and stop giving yourself brainworms with philosophy cooked up by bored, rich old drunks."
But everyone has existential thoughts, so why shouldn't it be a feature of stories?