>>281508419
Yoshida's goal in the story so far is to prevent the world from ending.
Yoru is currently at war against Public Safety, and if he learns about her current goals he will antagonize her.
And I'm being generous already by thinking of a scenario where he doesn't just get slaughtered alongside the rest of the Devil Hunters who are fighting her offscreen.
He already tried to kill Asa for much less than what is currently going on.

During Aging we literally saw him switch sides after receiving an explanation about what was currently going on.