Popa, a Yoetzet is not a rabbi, Conservative or otherwise. Nor do they claim to be. This is not the same thing as the maharat situation. The Yoatzot are women who are specifically trained in hilchos niddah, to help women with niddah shailos. In any questionable circumstance, they confer with a Rov to get a p’sak.
Many women are extremely uncomfortable and hesitant to go to a Rov regarding certain niddah issues, and considering how much emphasis we put on Tznius, is that such a surprise to you? Some women can barely bring themselves to discuss their personal issues with their DOCTOR, much less their Rov. It is a GOOD thing that these women are trained in this area (and only this area, as far as I know). They always consult with a Rov when it is warranted. Believe it or not, many “shailos” are NOT shailos at all, and do not require a p’sak Halacha. I could give you several examples, but for tzniusdig reasons will refrain from doing so here.