An important point in the story of the Iliad is that Odysseus (hoping to win the hand of Penelope, King Tyndareus niece), proposes an "Oath of Tyndareus", which binds all the suitors of Helen to join one another if one of the suitors abducts her after she marries one.
That Oath was what provided the legal pretext for the whole of Trojan expedition.
It also provided the reason for Odysseus to be sent to Troy (resulting in both the fall of Troy and the "Odyssey"), for he was one of the suitors of Helen! (and he clearly had no wish to go, as evidenced by attempt to fake insanity when summoned).
If Odyssey actually wanted to marry Penelope and not Helen, why was he even among the suitors of Helen in the first place?
First, it seemed entirely useless to him. He could have proposed the Oath without being a Suitor.
Second, that roped him into the whole adventure, and he should have been wily enough to realize it was the risk.