PBA: Because, again, male Agunim are much rarer and have the recourse of a Heter Meah Rabannim. And I’m sure if the BDA ruled her a Mesarevet that between the members of the BDA, RCA, YU Roshei Yeshivah, Mashgichim, Kollel Elyon members, etc. a Heter Meah Rabbanim would not be hard at all for the BDA to get.
