That's my point. If the Jailer is evil, it's completely possible the orb was taken to prevent his release being easier in alignment with his imprisonment.
This is some Occam's Razor shit. This entire cockamamy fan-fiction invented from literally two incomplete models is a good example of how out of touch people are. People are more willing to trust generic one-liners that can have a lot of meanings, including some extremely dark ones ("I will set us all free!") rather than look at all the evidence because they're more predisposed to projecting onto vagueries.
Again, if they aren't just contrarians and trolls, which many of them are.
In any event, this thread is about Sylvanas, not the Jailer - I was using the heavy-handed nature of the Jailer as antagonist as an example to illustrate how weaksauce people are at reading the damn room.
The entire thematic point of the Shadowlands is that death is only the start of a new journey and there's entire cultures and civilizations beyond the veil.
The character trying to abolish a fundamental thing that we can't get rid of is probably supposed to be wrong, especially when she made her own bed to go to Super Hell now in the first place.
It would be cool if, say, the Elric Brothers could bring back the dead, but whether that's something that would be nice or not, you fucking can't. When a narrative introduces an absolute, it's usually putting characters who don't accept that absolute through the wringer. They're not getting rid of death in WoW. So the lady trying to abolish death is probably, at best, wrong, and more likely an antagonist.