it's kinda interesting if you see it in the historical context. apparently before ancient greece got back onto its feet again ancient greece's ancient greece(mycenaean greece)'s put more emphasis on chthonic/underworld deities, hades apparently didn't quite exist and poseidon was the most important not zeus, so SOMETHING happened during the dark ages and the olympians/celestial deities became the top dog, and besides poseidon other chthonic either god remakes or got pushed down and ignored or jumbled into a single being called hades. shows how the olympians tend to treat hades despite his importance in the cycle of the world.