See, dear OP, there is some word play/hypocrisy at play here- free will is the cornerstone of forsaken society.
Derek is not forsaken, which is why i assume nuVoss didn’t care a whole lot about this whole affair.
The same way Odyn’s valkyr were -not- forsaken so everyone is okay with the slavement attempt (even it was for the “greater good” and shalala shalala)
Now, It would be foolish of me to deal in absolutes, i but i dont think its a stretch to say that most forsaken care about their free will first and would have simply seen derek as a more useful Theresa.