When dealing with the Empire, there's willing and then there's "willing." Fallen Order showed that fairly quickly after Episode 3, the Empire could and would torture lightsiders into compliance. Sure, it doesn't work 100%, but then again, this is the same Empire that tried "build a giant planet-destroying battle station" twice (three times if you count Starkiller Base).
It doesn't really work though? Cere gives up Trilla's name under torture, but that didn't make her align with the Empire. Trilla wasn't really tortured into compliance, she was bitter that her name was given up and turned on her master for that betrayal.
I mean, a writer could make it work if they wanted to, but it would be more 'hammer a square peg into a round hole' than anything that makes sense naturally in itself.