PBA: There is a tremendous difference between a man remarrying and violating a Cherem of Rabbeinu Gershom (not even an Issur D’Rabannan) and a woman remarrying and being Chayav Misah. You have to realize that. A Frum person could easily choose violating a Cherem over a lifetime of loneliness. We probably wouldn’t even consider him any less Frum for that. But there is no way any woman with even a tiny bit of Yiras Shamayim would violate an Issur Misah, regardless of what the consequences of staying alone are.
Besides, he has the option of trying to give her the Get B’al Korchah. She has no other way to force him.