DY: Not every Yoetzet is perfect, or even good. Neither is every Rav. I’ve seen many Ravs Pasken based on Amaratzus. It’s sad but a part of life. That’s why it would be good if the girl described in the OP is a Yoetzet. Hopefully she would be a good one. And your assumption a few posts ago is wrong. There are plenty of Chareidi women who feel uncomfortable forwarding certain Shailas through their husbands. In fact, if I’m informed correctly, the first proposed Yoatzot were for the Chareidi community. There are also many husbands who feel uncomfortable asking these Shailas because it’s already secondhand and, as much as they try to avoid it, the husband has a certain bias involved. And the least bias there is in presenting any Shaila the better.
Logician: The point is, 90+% of the “Shailas” asked in Niddah situations have a clear Psak that is meant to be given. That is what these Yoatzot are taught to “Pasken”. For real Shailas that require a Shikul HaDa’as and not just pointing out a Mareh Makom (as my R”Y used to be Mechalek), Yoatzot have a Rav they are supposed to forward them to. No system is perfect, but there is certainly just as much room for Yoatzot to “Pasken” the issues that they do just like an average Shul Rav Paskens even though he’s not holding in Kol HaTorah.