Lokt..I think it's a pretty bad idea right now. Sayaka...is not stable. At all. She wished in a pretty bad place mentally, and once she's convinced she's made a mistake...it's pretty much a oneway path to a Witchout. Do we really want to tell her that she's made a horrible mistake right now before we've had a chance to make her feel like she's made a difference/not helpless? That's why she wished here.