PBA: A Yoetzet is not a Maharat. In fact, I would think that one of the basic differences between a Yoetzet and a Maharat is that a large Rov of people wanting to be a Yoetzet will be doing it to serve Klal Yisroel and a large Rov in Yeshivat Maharat want to destroy Klal Yisrael (by pushing a social agenda).
PF: Yasher Koach to your relative. Protests against Yoatzot nowadays are mostly political and, for the most part, the Halachic consensus is that there is no issue. She should just know the gravity of the job she is getting into.