How did the ancient Greeks deal with the concept of fate that is the characters have "free will" they are intelligent and their choices are not predetermined but certain events are predetermined. (this is my understanding)
What is Priam just killed Paris as a baby? What if he later killed/exhiled Paris or at least didn't make him the Trojan ambasador? (possibly not canon) What if Priam immediately returned Helen and had Paris killed/exiled? What if Priam made Paris continue the duel until one of him /Menelaus was dead?.. etc
Why couldn't Oedipus just refuse to marry anyone or at least anyone older?