However, by a Jewish court, once the verdict was issued to kill, they will certainly kill him - אבל בבית דין של ישראל כיון דגמר דיניה לקטלא מיקטל קטלי ליה
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Summary:
It is uncommon for the accused to be recalled; therefore we assume that he was killed.
Because of the embarrassment of the husband - משום בזיון דבעל
Summary:
We can either assume that there is no בזיון הבעל by יתנו (only by יכתבו), but we can also assume that even by יתנו there is בזיון הבעל. The משנה of האשה כותבת את גיטה, merely teaches us that she knows how to be מקנה, but not that she should write the גט.
And words cannot be delegated to a Shliach - ומילי לא מימסרן לשליח
Summary:
It is preferable to ask a contradiction from the person’s own view elsewhere. We cannot prove that ר"מ maintains מילי לא מימסרא לשליח, if we assume that there is a greater בזיון הבעל by חתימה than by כתיבה.