Why did Greek become a second language for educated Romans after Rome conquered Greece?

After Rome conquered Greece, Greek became a second language for educated Romans primarily because the Romans recognized the immense cultural and practical advantages of the more mature Hellenistic civilization.1

The Romans viewed mastery of the Greek language as a hallmark of a truly cultivated individual. Beyond its status as a prestige language for intellectual and literary activity, Greek served as a vital international language throughout the Mediterranean, particularly in the eastern territories that became Roman subjects.12

Furthermore, Roman aristocrats understood that Greek education provided essential training in oratory and rhetoric, which were powerful tools for statesmen in Roman political and legal life. Consequently, a grounding in Greek language and literature became considered essential for the Roman elite, with children often being tutored by Greek servants or slaves to ensure fluency in both languages from an early age. This bilingualism allowed the Romans to assimilate the structures and techniques of Hellenistic culture, which profoundly shaped the development of Latin literature.123