Besides, I wouldn't call any side that Set is aligned with wholly good, ever. Even if he were to switch to ours I wouldn't consider "our" side in any way good. It's not about Evil or Not-Evil. It's about what comes out of the end goal. By returning their worlds they have more to gain than starting fresh somewhere else. Meanwhile I think that many of our worlds don't deserve to be revived from destruction. Even people on Meridian's side are trying to revive worlds that have no right to live again.