Sam: Simply said, you are disagreeing with Rabbeinu Gershom. Perhaps you are of equal stature to him. (Rabbeinu Sam Me’or Hagola?) He proclaimed that wives have the right to refuse to accept a divorce even if their husband wants to give her one.
Why did R”G decree as such? Because if the wife feels that the marriage is repairable and salvageable it is her right to insist that the marriage be saved and preserved. Even against her husband’s wishes.