According to the discussion here as elaborated in the link, a forced Get as a Halachic matter (the opinion paskened in Shulchan Aruch), is simply that the Chachamim retroactively revoke the Kiddushin.
If so, why bother with the whole "forcing". Why not just have Beis Din write out a Get and deliver it?
Really only the Rambam's opinion would justify requiring the verbalized consent - and even that seems a stretch (if he really wants it, just do it!).
To clarify, I'm not questioning the fact that there is a need (as in this is the Halacha) to force the husband to agree. I'm just wondering why the need for the use of force like that, when in reality it accomplishes nothing (except according to the Rambam).
To ask this in Yeshivish: The saying רוצה אני is a גילוי and בירור that he in fact wants it, but the purpose is the wanting, not the incantation of the words. Therefore, in this case, since he doesn't want it anyway, why force the incantation of the words? How did that add anything to the Get.
Even according to the Rambam it seems דוחק to say that the requirement is a גילוי of the subconscious desire of the Yetzer Tov to listen to the Beis Din, because if we are sure it is there, why does he have to say it? But at least according to that, בדוחק, you can say that the requirement is that he actually reveals that desire. But what about the opinion which is actually the controlling Halachic opinion? What is the purpose and accomplishment of making him pretend to be מגלה something that isn't there? And that is so important that it is worth using torture to get there?