While Siri definitely has some room to grow (and also considering that this is The Simpsons...) this is more of a straw man than anything else. Obviously asking Siri something like obscure/trivial is not going to work out... only someone tech-illiterate [or trolling] would believe otherwise.
Siri isn't perfect, Google Whatever Voice App isn't perfect; each of their respective flaws is painfully obvious because of the way we use conversational language. But they are all getting better all the time.