nolongersingle,
That psak from Rav Soloveitchik z’tz’l, which is one of the few halachic positions he stated in writing during his lifetime, was more like 60 years ago. And the communities that have schools like he himself opened and also insisted on for Rabbi Rosenfeld’s community have grown by leaps and bounds. For example, when Rav Soloveitchik wrote that letter, Riverdale did not have a single Orthodox synagogue. Today it is full of Orthodox synagogues and all are packed every Shabat.