if it was told from a different point of view (POV), the story would completely change. Penelope is the wife, so you would only hear about her wishing her husband would come home and her nagging suitors, dependence on her son, etc. From Odysseus' perspective, it is his adventures against the Cyclopes, Posideon, Sirens, and other terrors of the sea. If it was from Posideon's POV, you would hear about how angry he is at Odysseus and his plans to destroy him.