The Crown Must Have an Owner.

The position of God of Misfortune must be filled. If the bearer resigns then the mantle passes to someone else.

The current bearer doesn't know how the new bearer is decided. But since this is the God of Misfortune, it is not a job we want to fall into the wrong hands. Better they do the absolute minimum to keep their position, and prevent a really really bold man from becoming God of Misfortune.

The Crown Must Have an Owner.

The position of God of Misfortune must be filled. If the bearer resigns then the mantle passes to someone else.

The current bearer doesn't know how the new bearer is decided. But since we are talking about the God of Misfortune after all, we don't want this job falling into the wrong hands.

The bearer keeps their job as an act of kindness. Rather than resigning, they prefer to do the absolute minimum to keep their position, and maybe prevent a really really bold man from becoming God of Misfortune.