Why did Zeus allow Hector to be killed?

Zeus allowed Hector to be killed as part of the larger narrative of fate and divine will in the Iliad. Although he respected Hector and his bravery, Zeus ultimately could not intervene against the predetermined course of events that the Fates had established. Additionally, Zeus aimed to maintain a balance in the conflict between the Trojans and the Greeks, allowing his son Achilles to exact vengeance for the death of Patroclus. This decision highlights the complex interplay between divine intervention and the inevitability of fate in Greek mythology.