RE ".... something as fluffy as ancient history could be worth a quarter of one’s final grade...."

Yess I have wondered this , even before I saw your comment

Being curious about why it is taught - I googled words ..."why is ancient history taught in schools..." and got the explanation below - It explains it to me - which I judge as reasonable ...

Ancient history is taught in schools to develop critical thinking, research, and analytical skills while providing knowledge of foundational concepts in government, law, and philosophy that shaped modern societies. Studying ancient civilizations helps students understand the origins of modern ideas and institutions, how past events influenced the present, and the legacies of different cultures. It fosters an appreciation for historical interpretation and the legacy of past societies through the study of written and physical sources.

Develops key skills: Studying ancient history builds essential skills like historical inquiry, interpretation of evidence, critical analysis, and evidence-based argumentation.

Fosters critical thinking: Students learn to analyze different perspectives on the past, understand cause and effect, and recognize the significance of events, ideas, and people from ancient times.

Explains modern origins: It provides context for the development of modern systems of law, government, art, and philosophy, as well as the origins of modern ideas and values.

Encourages a connection to the past: Students can engage with the past by examining written and physical sources, helping them understand the challenges and triumphs of ancient peoples and their enduring impact on the world.

Not sure, I should have posted this long (AI generated ) explanation - but I have ....