If he'd stayed, he'd be dead. For the time being, he wasn't much concerned with the idea of leaving. If he went home, he'd be dead. "I endured millennia trapped in Heaven until Michael decided to open the gates again. I can endure whatever this place has in store for me as well." This high council was just another thing to slowly be eroded and outlasted. Never wasn't truly a concept Samandriel believed in. Everything was just a matter of time.