Obviously it'll be a lot easier to convince the Prime deities(unsure about Kord though) but let's consider SOME of the betrayer gods like Torog-
He can potentially finally have an existence free from the pain that his divinity brought him, and i think he'd choose to die permanently instead of being reincarnated from the fear of feeling it again.
Lolth could try and make amends with her children,she still somewhat cares, albeit in an obsessive controlling way.
Dunno why people even think about Tharizdun,it isn't a god,and both primes and betrayers fear and hate it.
Bane could lead a mighty empire,but as a mortal king
Asmodeus is too prideful to give up on the one thing that in his mind makes him so much better than the glorified meat puppets he calls mortals. He's too resentful,too caught up in his own pain to let go.
Tiamat and Zehir are uh....well Tiamat is still a giant ass five headed dragon whether she's a goddess or not, plus nobody likes Zehir.
It's moments like these that make me wonder of Glasya Exists in the Exandria setting
Aside from how heartbreaking it is that Braius is so desperate for love and family he'd seek it in the LORD OF HELLS, and how he tragically reflects Zerxus in his reaching out to Asmodeus, i think from a broader perspective its absolutely fucking hilarious the sheer quantity of family issues being projected onto Asmodeus of all people.
Like, you've got Zerxus projecting his son issues onto him (objectively insane), and now Braius projecting HIS family/relationship issues onto him with a bit of parasocialism thrown into the mix, dude cannot catch a break shsjskhhh
It's like, it works in Asmo's favor, so he plays into it, but he's spitting acid every time. He wants to be FEARED and TERRIFYING and SEXY and these stupid mortals keep putting him into the "vaguely familial figure" box and he HATES it
Just, the level of delirium being thrown at him at all times, its truly fitting for the Father of Lies hahaha
Listen, Matt Mercer is, respectfully, a beautiful man as he is. But Matt Mercer as Amodeus? Holy fucking hells