You yourself now are back to saying she should have a right to not work with them.
So which one is it now? You're back to saying Kesha has a legal right and she should demand that right and thus have SONY release her from her contract? Because that is what you just stated; you typed: she should have a right not to work with them.
And that is complete ********. She doesn't have a right to hold her employeer responsible or to bring her employer financial harm for something she says someone else did.