SJS and Oomis, you’re right.
BUT the big question here is, why are girls who are living in communities, and going through BY systems, where there are certain standards of tznius (not necessarily Rav Falk, but knees, elbows, feet and collarbones covered all the time) NOT living that way? You can go on and on about other halachic points of views and I will not impugn your rabbinic authorities. We are talking of a milieu where certain things should be givens, and sadly are not.