Turns out that Odysseus may have been an actual historical figure, not just a character in Homer's Iliad. His likely tomb has been located in the village of Poros, on the Greek island of Kefalonia. And various details of Homer's account, such as the physical description of Odysseus's homeland, are supported by archaeological evidence.
Perhaps we should conclude from this evidence that Odysseus really was tormented by the sea-god Poseidon, that he blinded the cyclops Polyphemus, that the sorceress Circe turned his men into pigs, etc.
That, at least, is the logic of some Christians, who point to historical evidence about the life of Jesus to support their claim that he really was the son of God, that he walked on water, that he rose from the dead, and so on.