“you are equating those who permitted these girls to wear tefillin with The Gr’a, Rav Yosef Dov Halevi Soleveitchik “
My rav told me years ago that Rav Soloveitchik z’tz’l told him explicitly that women could put on tefillin if the motivation was correct.
” they would never IGNORE earlier authorities, they might rule differently DESPITE the rulings of earlier authorities”
In the case of women and tefillin, it is the earlier authorities who permit and the later authorities who don’t.