Joseph,
Notwithstanding your quotes from Rabbi Chaim Soloveitchik, and his son Rabbi Yitzchok Zev Soloveitchik, an older son, Rabbi Moshe Soloveitchik, joined Mizrachi. Rabbi Moshe Soloveitchik’s son, Rabbi Joseph Soloveitchik, became the head of Mizrachi.
Regarding pants, the religious Zionist kibbutz movement explicitly *permit* pants for women. You and your rabbis may disagree with the ruling, but they are a legitimate part of the worldwide Torah community, and therefore their opinion must be accepted as valid, and the members of that community may rely on it.