The Mighty Greek Gods... well most of them anyways

When it comes to Greek mythology we might not be experts on the gods but you probably know the the big ones like Zeus or Poseidon but lets look at the mixed up family tree a little bit closer.The gods ultimate creator was Chaos whose offspring, Gaia had her own twelve children called the Titans. Cronus the Titan overthrew his father but when his son Zeus became older Zeus overthrew Cronus (mother was Rhea). Now the gods begin to get a little bit more familiar. Zeus's siblings included Poseidon, Hades, Hestia, Hera and Demeter. He went on to marry Hera and had Ares, Hephaestus and many more depending on where you look. He also went on and had many other children with many different people like Hestia, Nemesis, Leto, Metis,... his many children include Dionysus, Hermes, Apollo, Artemis, Athena, Ares, Hephaestus, Persephone, Hebes and many more. After that it splits off into less well know gods and too many names to list. Depending on which source you look at there will be different family trees but even without splitting hairs it is confusing enough. Why do you think the ancient Greeks wove such detailed myths about their gods?