Doesn't work that way. The Truth of who Diana is is not a sadist or a pawn of Darkseid. The Truth is that the things the Furies believe and hold sacred are not things Diana believes or holds sacred, and using the Lasso would have brought that True kernel of Diana to the surface. The only way to change that, to make the ALE!Wondy "true," would be to completely obliterate Diana - to make her, basically, Genocide. Nothing left but the body. In which case, it wouldn't have been possible to rescue or restore her.