where normative halacha permits him to choose not to grant a requested divorce.
Whose “normative Halacha”? If you hold of the P’sak of the BDUSA, then it is their decision whether the husband will have to give a Get or not. Worst case, he will go to court and the Bais Din will say the he doesn’t have to give a Get.
they can and should give in to all of the husbands demands to get their Get
This isn’t the objection. The objection is that he has the halachic and moral right to choose to continue the marriage.
Hu Hadin, Hu HaTaam.
DY – Even if that is what PBA’s Rosh Yeshiva said, PBA wouldn’t post it here. So there is no reason for me to continue to chepper him on it.