Polytheism the Issue

This week I would like to concentrate on Book V of Homer's The Odyssey, more specifically how the polytheistic beliefs of the Greeks, and most specfically Odysseus, weaken his character as a true hero.  I fully realize that in the time of Homer not only did the Greeks, and most of the Western World, believe that divine intervention was a true and realistic possibility, but also that it serves for entertaining text; however, to me, it serves as a hero's crutch.  In Book V, The Odyssey picks up with Oysseus in the midst of his own hell:  he has been marooned on an island, a slave of the irresistbale nymph Calypso.  In short, Calypso holds Odysseus captive on her island.  Every night she lures him to her bed, and every day he weeps in regret and pain.  And, at the conclusion of Book V Odysseus, with the help of Hermes, is able to trick Calypso into allowing his freedom from the island and more importantly her temptuous grasp.  Here, where most see a mortal man who, with his cunning, has worked his way to being one step ahead of the demigod Calypso, I see an easy way out.  Calypso, or any demigod or God for that matter, are excuses.  Excuses for action and poor excuses for escape and weakness.  To me, a true hero does not need infallable, divine enemies to conquor in order to be great, a true hero needs cunning, guile, strength, and honor.  Odysseus' true enemy should lye more in the Trojans - fellow men, who like Odysseus bleed, smile, and weep.  In all honesty, I feel the impossiblity of theses divine interventions take away from the truly epic hero Odysseus could be.