User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10487081-20130424022526/@comment-3285234-20130424083224

First, the parents of the other demigods in the ship won't allow any harm to the Argo II.

Second, the gods are too busy being schizophrinic to do anything.

Third, he is the guide of the Seven (Five) to HoH, why would they ruin their chance to win this war?