He doesn’t want it. He considers his ministry to the new Jedi a failure because it resulted in the perversion of his best friend’s son. This is also why he removed himself from civilization. He may even know his lost student just killed his best friend. He retired in shame, which means removing himself from activity - activity for a Jedi is wielding that thing she wants him to take.
I think that’s it exactly. He doesn’t look happy to see her.