The difference between learning a modern language and an ancient language is that in first year French you learn “Where is the bathroom?” and “How do I get to the train station?” and in first year Attic Greek or Latin you learn “I have judged you worthy of death” and “The tyrant had everyone in the city killed.”
No, actually. Modern languages and ancient languages are just taught with different goals.
Modern languages are taugh in a way that will teach you how to have a conversation and how to make yourself clear in that language, while ancient languages are taugh in a way that will teach you how to read ancient texts. It’s quite logical that texts about the Trojan war don’t contain the sentence ‘How do I get to the train station?’ very often.